Cited by 54Quantum Information and CryptographyQuantum optics and atomic interactionsQuantum Mechanics and Applications

Polarization states of four-dimensional systems based on biphotons

Open access
Bogdanov, Yu. I., Moreva, E. V., Maslennikov, G. A., Galeev, R. F., Straupe, S. S., Kulik, S. P.·2006·Physical Review A

Abstract

We discuss the concept of polarization states of four-dimensional quantum systems based on the frequency nondegenerate biphoton field. Several quantum tomography protocols were developed and implemented for the measurement of an arbitrary state of ququart. A simple method that does not rely on the interferometric technique is used to generate and measure the sequence of states that can be used for quantum communication purposes.

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Crossref · 10.1103/physreva.73.063810

Cites

38 of 38 references verified0 citation errors · 0 not checkable

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  • Key reasons for the differences from the cited two-qubit treatment are the symmetry of wave functions and the higher dimensionality of ququarts compared with qutrits, properly taken into account.

    “As explained above, key reasons for this and other differences between this paper [31] and others are in the symmetry of wave functions and in a higher dimensionality of ququarts compared with qutrits properly taken into account in equations (7.9)-(7.12)and (7.14).”

    From Entanglement of biphoton states: qutrits and ququarts (2011) · cites this paper as [31]

    The Introduction (p. 1) identifies ququarts as four-dimensional and qutrits as three-dimensional, and Section E (p. 4) describes a difference in their polarization transformations. The copy does not explicitly identify wave-function symmetry as a key reason for the citing paper’s differences from other treatments; that causal explanation is not established by the cited passages. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • Methods of using series of coincidence measurements for reconstructing parameters of quantum states are alternative to standard and rather widely used methods of quantum tomography for biphoton ququarts [1, 9, 10].

    “Note also that the methods of using series of coincidence measurements for reconstructing parameters of quantum states are alternative to standard and rather widely used methods of quantum tomography for biphoton ququarts [1, 9, 10].”

    From Biphoton ququarts as either pure or mixed states, features and reconstruction from coincidence measurements (2013) · cites this paper as [1]

    The Measurement section (p. 6) describes coincidence measurements for reconstructing biphoton ququarts, and Results and discussion (p. 9) reports reconstruction from a series of coincidence-rate measurements. But Protocol 1 (p. 7) calls its measurement series a tomography protocol; the paper does not establish that coincidence-based reconstruction is an alternative to standard quantum tomography rather than a form of it. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • The derived 4×4 reduced density matrix (7.15) differs significantly from the 2×2 density matrix of the paper where ququarts were considered as two-qubit states.

    “The derived expression for the 4 × 4 reduced density matrix (7.15) differs significantly from the 2 × 2 density matrix of the paper [31] where ququarts were considered as two-qubit states.”

    From Entanglement of biphoton states: qutrits and ququarts (2011) · cites this paper as [31]

  • All biphoton ququarts are entangled and non-factorable, in contrast to the earlier two-qubit model assumption that at C1C4 = C2C3 ququarts are factorable.

    “This means that all biphoton ququarts are entangled and non-factorable (in contrast to this, earlier [31], in a two-qubit model, it was assumed that at C 1 C 4 = C 2 C 3 ququarts are factorable).”

    From Entanglement of biphoton states: qutrits and ququarts (2011) · cites this paper as [31]

  • This procedure serves as an alternative protocol of quantum state tomography of ququarts described in the work [31].

    “This procedure serves as an alternative protocol of quantum state tomography of ququarts described in the work [31].”

    From Entanglement of biphoton states: qutrits and ququarts (2011) · cites this paper as [31]

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Cites

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Research works printed but not linked: 1

  1. [24]Y.H.Kim, S.P.Kulik, and Y.Shih. Phys. Rev. A 63, 060301 (2001).

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Authors
Bogdanov, Y. I., Moreva, E. V., Maslennikov, G. A., Galeev, R. F., Straupe, S. S., & Kulik, S. P.
Affiliations
Russian Academy of Sciences (RU)
Venue
Physical Review A
Published
2006-06-09
Volume
73
Issue
6
ISSN
  • 0556-2791 (ISSN-L)
  • 1050-2947
  • 1094-1622
OpenAlex
W2043254046
Cited by
54
References
38
Citations by year
2024: 3 · 2023: 3 · 2022: 2 · 2021: 1 · 2019: 3 · 2017: 1 · 2016: 2 · 2015: 1 · 2014: 4 · 2013: 2 · 2012: 1
FWCI
6.09
Type
journal article
Language
en
Open access
Locations
  • Physical Review A (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • National University of Singapore (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
Keywords
biphotons, polarization state, ququarts, quantum state tomography, quantum communication

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