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Disturbing Implications of a Cosmological Constant
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The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“The energy of the configuration then is given by (4.5), H = 2.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
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In the paper
“This solution makes manifest that the energy is independent of the matter content of the space.”
- Also stated in: § JHEP10(2002)011 · plain
“Since ∂ ρ Z = 1, the energy is independent of the matter content of the space.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
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The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Thus the constraint requires H = 2.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
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In the paper
“The condition that the metric be continuous across r = r 0 requires r = βr + r 0 (α -β) and t = β -1 t, with”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“The typical time for a fluctuation to occur is of order T r ∼ exp (S -S ) ,(5.1)”
§ Disturbing implications of a cosmological constant > 5. Complementarity and its implications
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“The method of steepest descent can be used to show L ∼ exp(-S) . (A.14)”
§ Disturbing implications of a cosmological constant > Additional information
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In the paper
“Let us consider the entropy in observable matter in today's universe.It is of order 10 100 .”
§ Disturbing implications of a cosmological constant > 6. The misanthropic universe?
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“This bound can easily be shown to be equivalent to the covariant entropy bound as proposed in [31].”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
What the sources say
- Not checked yetcites [31] S.W. Hawking, 1996, Class. Quantum Grav. source
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesA conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“The implication of such a description, as we have suggested in section 1, is that Poincaré recurrences are inevitable.”
- Also stated in: § 5. Complementarity and its implications · boosted
“Given our assumptions, the conclusion that such Poincaré recurrences of the universe occur is unavoidable.”
§ Disturbing implications of a cosmological constant > 5. Complementarity and its implications
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passes- The authors state this as an assumption: The physics inside an observer's causal patch is exactly described by a dual quantum system with a Hamiltonian and a space of states, and the state is a thermal density matrix exp(−βH) at the appropriate temperature.
- The authors state this as an assumption: The maximum entropy the system can ever have is the entropy of a de Sitter space whose size is set by the cosmological constant.
- The authors state this as an assumption: Horizon Complementarity is taken to mean that physics in the causal patch can be described as a closed or isolated system using conventional quantum mechanics.
- Also stated in: § 5. Complementarity and its implications · boosted
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“As we shall see, it implies that the universe has neither JHEP10(2002)011 a beginning nor and end.Instead, it intermittently recycles itself, but in a way that is very different from so called cyclic universes.”
§ Disturbing implications of a cosmological constant > 5. Complementarity and its implications
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passes- The authors state this as an assumption: The physics inside an observer's causal patch is exactly described by a dual quantum system with a Hamiltonian and a space of states, and the state is a thermal density matrix exp(−βH) at the appropriate temperature.
- The authors state this as an assumption: Horizon Complementarity is taken to mean that physics in the causal patch can be described as a closed or isolated system using conventional quantum mechanics.
- It may state two separate claims as one. 39
- The quote only partly states this claim. 13
- Probably not a substantial claim. 10
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“The fluctuations we have in mind correspond to early inflationary eras during which the entropy is probably of order 10 10 , while the equilibrium entropy is of order 10 120 .Thus T r ∼ exp 10 120 .”
§ Disturbing implications of a cosmological constant > 5. Complementarity and its implications
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In the paper
“This corresponds to a positive energy density in the ring (for α > 0), with some tension to hold it static.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Strength:plain· not yet calibratedCausal:direct· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“The back reaction on the geometry is small, but it results in making the Penrose diagram slightly taller.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one. The quote only partly states this claim.
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In the paper
“There are solutions which in FRW coordinates roll from negative to positive φ, going over the step at some fairly localized time.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one. The quote only partly states this claim.
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In the paper
“Note that the area of the horizon is 2πα ≤ 2π.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“Inside the ring, the solution is pure de Sitter space with no deficit angle.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
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In the paper
“In this case the domain wall originates at the observer and falls toward the horizon.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe quote only partly states this claim.
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In the paper
“In the former case, a domain wall or wave of decreased cosmological constant originates at the horizon (ρ = ∞) and propagates inward toward the observer.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
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In the paper
“This solution is unstable to non-spherically symmetric perturbations, but this is not important for our purposes.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Strength:plain· not yet calibratedCausal:direct· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
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In the paper
“In some cases it may even reach the pole, so that the causal patch may temporarily become a closed sphere, with the horizon disappearing for a time.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“This”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
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The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“The entropy of such configurations is very low.In a typical high-scale inflationary theory, the entropy of the initial de Sitter-like space can be as low as 10 10 .The entropy of the final de Sitter space (assuming the observed value for the dark energy) is of order 10 120 .”
§ Disturbing implications of a cosmological constant > 6. The misanthropic universe?
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In the paper
“It starts with a big bang singularity and ends with a final crunch.”
§ Disturbing implications of a cosmological constant > 2. The AdS black hole as a cosmology
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one. The quote only partly states this claim.
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In the paper
“The reason is that the causal patch does not have the analog of an ultraviolet boundary.Because AdS has such a boundary it is possible to modify the boundary conditions without changing the fact that the bulk theory still satisfies the bulk field equations.Without such a boundary there is no way to do the same for de Sitter space.”
§ Disturbing implications of a cosmological constant > 5. Complementarity and its implications
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: The ideas of holography and complementarity can be applied to de Sitter space.
In the paper
“On the average it is in a steady state of thermal equilibrium.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
What the sources say
- Not checked yetcites [23] source
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
- The authors state this as an assumption: The usual connections between quantum statistical mechanics and thermodynamics hold.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“One important fact is that these recurrences cannot be described by classical general relativity.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one. The quote only partly states this claim.
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In the paper
“This implies an initial holographic entropy of about 10 10 , which is extremely small by comparison with today's visible entropy.”
§ Disturbing implications of a cosmological constant > 1. Recurrent cosmology
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: The universe began with an inflationary phase and will end in an accelerated de Sitter phase.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“It is evident from the diagram that the classical geometry can be interpreted as a cosmology.”
§ Disturbing implications of a cosmological constant > 2. The AdS black hole as a cosmology
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one. The quote only partly states this claim.
In the paper
“In other words, the theory describes a closed isolated box bounded by the observer's horizon, and makes reference to no other region.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
What the sources say
- Not checked yetcites [2] source
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: The holographic and horizon complementarity principles are valid assumptions for describing horizons.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This is very unnatural and presumably means that the universe starts in very special, extremely fine tuned state.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“The entropy usually ascribed to de Sitter space is that of the causal patch.”
§ Disturbing implications of a cosmological constant > 3. Thinking inside the box
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In the paper
“However, intermittent fluctuations occur which temporarily disturb the equilibrium.It is during the return to equilibrium that interesting events and objects form.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“From the fact that the entropy is finite, it follows that the energy levels are discrete and that the number of levels below any given energy is finite.”
§ Disturbing implications of a cosmological constant > 5. Complementarity and its implications
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: The physics inside an observer's causal patch is exactly described by a dual quantum system with a Hamiltonian and a space of states, and the state is a thermal density matrix exp(−βH) at the appropriate temperature.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Because the boundary of the box is a horizon, the box has a finite temperature and entropy:”
§ Disturbing implications of a cosmological constant > 3. Thinking inside the box
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“More precisely, the number of degrees of freedom borrowed from the stretched horizon is the product of the mass and the de Sitter space radius.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
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In the paper
“The low entropy starting point is the ultimate reason that the universe has an arrow of time, without which the second law would not make sense.”
§ Disturbing implications of a cosmological constant > 1. Recurrent cosmology
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✗ Based: failsProbably not a substantial claim. The paper may give no reason why it holds. It may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Observations by the observer are known to be completely described by a unitary holographic quantum mechanics with no loss of information.”
§ Disturbing implications of a cosmological constant > 2. The AdS black hole as a cosmology
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In the paper
“The conventional view is that the universe will end in a de Sitter phase with all matter being infinitely diluted by exponential expansion.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✗ Asserted: fails✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim. The authors may not put it forward as true. It may state two separate claims as one.
- The authors state this as an assumption: The universe began with an inflationary phase and will end in an accelerated de Sitter phase.
None of the sources cited for this claim have been checked yet.
In the paper
“Then on time scales of order T r ∼ exp S (1.1) the system will undergo Poincaré recurrencesfoot_2 [8,9].”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
What the sources say
- Not checked yetcites [8] W. Fischler
- Not checked yetcites [9] L. Dyson, 2002, J. High Energy Phys. source
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“These assumptions-together with the existence of a final cosmological constant-imply that the universe is eternal but finite.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: The universe began with an inflationary phase and will end in an accelerated de Sitter phase.
- The authors state this as an assumption: A final cosmological constant exists.
- The authors state this as an assumption: The usual connections between quantum statistical mechanics and thermodynamics hold.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“In other words, the second law and the existence of a time arrow are anthropic.They are part of the environmental conditions needed for life.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Starting in a high entropy,”
§ Disturbing implications of a cosmological constant > 5. Complementarity and its implications
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe quote only partly states this claim.
- The authors state this as an assumption: The physics inside an observer's causal patch is exactly described by a dual quantum system with a Hamiltonian and a space of states, and the state is a thermal density matrix exp(−βH) at the appropriate temperature.
- The authors state this as an assumption: The maximum entropy the system can ever have is the entropy of a de Sitter space whose size is set by the cosmological constant.
None of the sources cited for this claim have been checked yet.
In the paper
“The remedy suggested by the black hole analogue is obvious; restrict all attention to a single causal patch [5,8,9].”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
What the sources say
Load-bearingStrength:hedged· not yet calibratedTests✓ Asserted: passes✗ Checkable: fails✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim. It may be too vague to check against evidence.
None of the sources cited for this claim have been checked yet.
In the paper
“We now know that this is an artifact of trying to describe the complex interacting degrees of freedom of the horizon by quantum field theory defined on both the interior and exterior of the black hole.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
What the sources say
- Not checked yetcites [1] L. Susskind
- Not checked yetcites [2] source
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: The holographic and horizon complementarity principles are valid assumptions for describing horizons.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“For reasons that have been explained in many places, if we want to apply the ordinary principles of unitary quantum mechanics to a system with horizons, we need to restrict attention to the region on the observer's side of the horizon.”
§ Disturbing implications of a cosmological constant > 3. Thinking inside the box
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✗ Based: failsProbably not a substantial claim. The paper may give no reason why it holds.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Under these kind of circumstances there should be large amounts of entropy production.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This implies that the horizon entropy within the causal patch in the far future and past is bounded in the ordinary way.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one. The quote only partly states this claim.
- The authors state this as an assumption: The universe began with an inflationary phase and will end in an accelerated de Sitter phase.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“A more reasonable cosmology can result if we started with a far from equilibrium configuration.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe quote only partly states this claim.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Horizon Complementarity then says the universe is described by any observer as a closed and finite system.”
§ Disturbing implications of a cosmological constant > 5. Complementarity and its implications
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
- The authors state this as an assumption: Horizon Complementarity is taken to mean that physics in the causal patch can be described as a closed or isolated system using conventional quantum mechanics.
In the paper
“This system, although unrealistic as a cosmology, is extremely well understood through the AdS/CFT duality.”
§ Disturbing implications of a cosmological constant > 2. The AdS black hole as a cosmology
What the sources say
- Not checked yetcites [19] S. Hawking, 1983, Comm. Math. Phys. source
Load-bearingStrength:boosted· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Perhaps the most important conceptual lesson that we have learned from string theory is that quantum gravity is a special case of quantum mechanics.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“In all of these worlds statistically miraculous (but not impossible) events would be necessary to assemble and preserve the fragile nuclei that would ordinarily be destroyed by the higher temperatures.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one. The quote only partly states this claim.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“However, although each of the corresponding histories is extremely unlikely, there are so many more of them than those that evolve without”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“For a perturbation on the past boundary to influence the causal patch, the signal must pass through the past horizon of the observer.However the past horizon is just the infinite past t = -∞.”
- Also stated in: § JHEP10(2002)011 · boosted
“Obviously, any such perturbation of a finite entropy thermal cavity will re-thermalize after a finite time.In fact, at any finite time, an infinite number of Poincaré recurrences have already occurred.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Load-bearingStrength:boosted· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: The physics inside an observer's causal patch is exactly described by a dual quantum system with a Hamiltonian and a space of states, and the state is a thermal density matrix exp(−βH) at the appropriate temperature.
- The authors state this as an assumption: The maximum entropy the system can ever have is the entropy of a de Sitter space whose size is set by the cosmological constant.
- Also stated in: § JHEP10(2002)011 · boosted
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Although L may be incredibly small for sufficiently large systems, it will not vanish since the entropy of a finite system is finite.It will vanish, however, for systems that are infinite.”
§ Disturbing implications of a cosmological constant > Additional information
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Only the first occurrence would evolve in a way that would be consistent with usual expectations.Subsequently the recurrences would be extremely unlikely to be consistent, in this sense.Thus the anthropically acceptable part of spacetime would be dominated by peculiar, incomprehensible conditions.”
§ Disturbing implications of a cosmological constant > JHEP10(2002)011
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
In the paper
“The quantum Poincaré Recurrence theorem is similar and can be stated as follows: given a system in which all energy eigenvalues are discrete, a state will return arbitrarily close to its initial value in a finite amount of time.”
§ Disturbing implications of a cosmological constant > Additional information
What the sources say
- Not checked yetcites [25]-[27]
Strength:plain· not yet calibratedCausal:direct· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Additionally, in the limit of a continuous energy spectrum, the quantum theorem breaks down.This breakdown corresponds to a classically unbounded system and hence the breakdown of the classical theorem as well.”
§ Disturbing implications of a cosmological constant > Additional information
Strength:plain· not yet calibratedCausal:direct· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
The authors state this as an assumption.
The universe began with an inflationary phase and will end in an accelerated de Sitter phase.
“Present cosmological evidence points to an inflationary beginning and an accelerated de Sitter end.”
The authors state this as an assumption.
A final cosmological constant exists.
“These assumptions-together with the existence of a final cosmological constant-imply that the universe is eternal but finite.”
The authors state this as an assumption.
The usual connections between quantum statistical mechanics and thermodynamics hold.
“In the following we will assume the usual connections between quantum statistical mechanics and thermodynamics.”
The paper relies on this without support.
There is no universally accepted explanation for how the universe reached its exceptionally low-entropy initial state.
“However, there is no universally accepted explanation of how the universe got into such a special state.”
The paper relies on this without support.
Neither string theory nor quantum gravity currently provides a consistent account of the initial singularity or the low initial entropy.
“Neither string theory nor quantum gravity provide a consistent starting point for a discussion of the initial singularity or why the entropy of the initial state is so low.”
The paper relies on this without support.
The late-time behavior of a universe with a cosmological constant is not well understood.
“The late time features of a universe with a cosmological constant are also not well understood.”
The authors state this as an assumption.
The holographic and horizon complementarity principles are valid assumptions for describing horizons.
“under a set of assumptions motivated by the holographic and horizon complementarity principles”
The authors state this as an assumption.
The physics inside an observer's causal patch is exactly described by a dual quantum system with a Hamiltonian and a space of states, and the state is a thermal density matrix exp(−βH) at the appropriate temperature.
“We assume that the physics within the causal patch is exactly described by a dual quantum system that includes a hamiltonian H and a space of quantum states.Furthermore the state of the world within the causal patch is density matrix exp (-βH) with the appropriate temperature.”
The authors state this as an assumption.
The maximum entropy the system can ever have is the entropy of a de Sitter space whose size is set by the cosmological constant.
“Furthermore we assume that the maximum entropy that the system can ever have is given by the entropy of a de Sitter space, whose size is determined by the cosmological constant.”
The authors state this as an assumption.
There is a fundamental cosmological constant.
“• There is a fundamental cosmological constant.”
The authors state this as an assumption.
The ideas of holography and complementarity can be applied to de Sitter space.
“• We can apply the ideas of holography and complementarity to de Sitter space.”
The authors state this as an assumption.
The time evolution operator is unitary, so phase-space area is conserved.
“• The time evolution operator is unitary, so that phase space area is conserved.”
The authors state this as an assumption.
The observer's proper time goes to infinity in the remote past and remote future, and the trajectory does not hit a singularity in finite proper time.
“We have made the assumption that the proper time along the observer's trajectory goes to infinity in the remote past and the remote future; i.e., the trajectory does not encounter a singularity in finite proper time.”
The authors state this as an assumption.
Horizon Complementarity is taken to mean that physics in the causal patch can be described as a closed or isolated system using conventional quantum mechanics.
“For our present purposes, Horizon Complementarity will be taken to mean that physics in the causal patch can be described in terms of a closed or isolated system described by conventional quantum mechanics.”
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
Covariant entropy bound points to the wrong reference
MinorThe cited entry [31] concerns the gravitational Hamiltonian. The reference list instead identifies [32] as the covariant entropy conjecture.
“This bound can easily be shown to be equivalent to the covariant entropy bound as proposed in [31].”
“31. S.W. Hawking and G.T. Horowitz, The gravitational hamiltonian, action, entropy and surface terms, Class. and Quant. Grav. 13 (1996) 1487 [gr-qc/9501014]. 32. R. Bousso, A covariant entropy conjecture, J. High Energy Phys. 07 (1999) 004 [hep-th/9905177];”
Both ring metrics are assigned to the inside region
MinorThe first metric is described as the solution outside the ring, but its stated range is r < r0. The metric explicitly described as inside the ring has the same range, leaving no stated range for the exterior solution.
“The solution outside of the ring will have a deficit in the range of the angular variable.The solution can be written ds 2 = R 2 (1 -r 2 )dt 2 -(1 -r 2 ) -1 dr 2 -α 2 r 2 dθ 2 (r < r 0 ) ,(”
“Inside the ring, the solution is pure de Sitter space with no deficit angle.The metric is ds 2 = R 2 (1 -r 2 )dt 2 -(1 -r 2 ) -1 dr 2 -r 2 dθ 2 (r < r 0 ) .”
Entropy formula has the opposite sign
MinorFor a normalized density matrix, Trρ log ρ is nonpositive. It therefore cannot equal the stated entropy, which is the logarithm of a number of effective states.
“More exactly it is Trρ log ρ, where ρ is the density matrix describing the causal patch.”
“As in the black hole case, it is the logarithm of the number of effective quantum states of the thermal ensemble.”
Citations
Cites
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The stretched horizon and black hole complementarity
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Self-citationQuantum Gravity In De Sitter SpacePreprint
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The gravitational Hamiltonian, action, entropy and surface terms
Hawking, S. W., & Horowitz, G. T. (1996) · Classical and Quantum Gravity · doi:10.1088/0264-9381/13/6/017 · Cited by 704
Dimensional Reduction in Quantum Gravity
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The Holographic Bound in Anti-de Sitter Space
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Self-citationThe approach to thermal equilibrium in quantized chaotic systems
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Conformal vacua and entropy in de Sitter space
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The Quantum Gravitational Back-Reaction on Inflation
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Positive vacuum energy and the N-bound
Bousso, R. (2000) · Journal of High Energy Physics · doi:10.1088/1126-6708/2000/11/038 · Cited by 265
String theory and quintessence
Hellerman, S., Kaloper, N., & Susskind, L. (2001) · Journal of High Energy Physics · doi:10.1088/1126-6708/2001/06/003 · Cited by 256
Self-citationThe acceleration of the universe, a challenge for string theory
Fischler, W., Kashani-Poor, A., McNees, R., & Paban, S. (2001) · Journal of High Energy Physics · doi:10.1088/1126-6708/2001/07/003 · Cited by 177
Is There Really a de Sitter/CFT Duality
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M theory observables for cosmological space-times
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Bekenstein bounds in de Sitter and flat space
Raphael Bousso, A. (2001) · Journal of High Energy Physics · doi:10.1088/1126-6708/2001/04/035 · Cited by 127
Vacuum states and the S matrix in dS/CFT
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Almost Periodicity and the Quantal H Theorem
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Self-citationThoughts on Big BangPreprint
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Flagged first, then by citations
Research works printed but not linked: 1
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Cited by
Sorted by citations
de Sitter vacua in string theory
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Self-citationBlack holes and random matrices
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Roberts, D. A., & Yoshida, B. (2017) · Journal of High Energy Physics · doi:10.1007/jhep04(2017)121 · Cited by 521
Metadata
- Authors
- Dyson, L., Kleban, M., & Susskind, L.
- Affiliations
- Massachusetts Institute of Technology (US)
- Stanford University (US)
- Venue
- Journal of High Energy Physics
- Published
- 2002-10-02
- Volume
- 2002
- Issue
- 10
- Pages
- 011-011
- ISSN
- 1029-8479 (ISSN-L)
- OpenAlex
- W2141674504
- Cited by
- 338
- References
- 22
- Citations by year
- 2026: 6 · 2025: 11 · 2024: 15 · 2023: 20 · 2022: 20 · 2021: 18 · 2020: 9 · 2019: 28 · 2018: 7 · 2017: 14 · 2016: 12 · 2015: 7 · 2014: 8 · 2013: 8 · 2012: 14
- FWCI
- 11.63
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of High Energy Physics (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (9870115)
- Mellam Family Foundation
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Black Holes and Theoretical Physics
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Noncommutative and Quantum Gravity Theories
- Keywords
- cosmological constant, holographic principle, causal patch, cosmological evolution, spacetime structure, cosmological paradoxes, quantum gravity
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
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