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Cited by 519Quantum optics and atomic interactionsStrong Light-Matter InteractionsQuantum Mechanics and Applications

Nonperturbative decay of an atomic system in a cavity

Garraway, B. M.·1997·Physical Review A
DOI 10.1103/physreva.55.2290
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Abstract

Atoms can nowadays be placed in increasingly exotic environments such as microscopic cavities and materials with photonic band gaps. High-Q cavities can now easily result in a strong coupling between an atom and its environment where perturbation theory should no longer be appropriate. The purpose of this paper is to describe the dynamics of a multilevel V-type atomic system (including the case of a two-level system) which interacts with a reservoir modeled by a generalized density of states. A theoretical construct, the pseudomode, is utilized to develop general methods for solution. Without using perturbation theory the equivalent master equation is developed and the relationship between the master equation, the pseudomodes, and the generalized density of states function is explored with examples. Utilizing a straightforward definition of the pseudomode, it is found that many functions for the density of states lead to problematic non-Lindblad master equations. Several examples are given, and it is shown how to convert the non-Lindblad master equations into a Lindblad form in these cases. The examples include a non-Lorentzian resonance and a simple model of a photonic band gap.

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Crossref · 10.1103/physreva.55.2290

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  • Non-Markovian dynamics better preserve quantum information due to backflow of quantum information from the reservoir to the central spin.

    “Furthermore, it is well-known that non-Markovian dynamics better preserve quantum information, as non-Markovianity induces a backflow of quantum information from the reservoir to the central spin [106,107,108,109,110,111,112,113,114,115,116].”

    From Quantum Models of Consciousness from a Quantum Information Science Perspective (2025) · cites this paper as [108]

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Authors
Garraway, B. M.
Affiliations
Imperial College London (GB)
Corresponding author
Garraway, B. M.
ORCID
Garraway, B. M.
Venue
Physical Review A
Publisher
American Physical Society (APS)
Published
1997-03-01
Volume
55
Issue
3
Pages
2290-2303
ISSN
  • 0556-2791 (ISSN-L)
  • 1050-2947
  • 1094-1622
DOI
10.1103/physreva.55.2290
OpenAlex
W2069207980
Cited by
518
References
31
Citations by year
2026: 53 · 2025: 41 · 2024: 40 · 2023: 32 · 2022: 24 · 2021: 32 · 2020: 27 · 2019: 28 · 2018: 24 · 2017: 20 · 2016: 17 · 2015: 18 · 2014: 14 · 2013: 12 · 2012: 19
FWCI
5.75
Type
journal article
Language
en
Open access
closed
Licence
link.aps.org/licenses/aps-default-license (vor)
Locations
Physical Review A (publishedVersion)
Funders
  • European Commission
  • Engineering and Physical Sciences Research Council
Topics
  • 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 › Strong Light-Matter Interactions
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
Keywords
atom-cavity coupling, two-level system, pseudomodes, Lindblad master equation, photonic band gap, high-Q cavity, open quantum systems

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