Photon-assisted Landau-Zener transition: Role of coherent superposition states
Open accessAbstract
We investigate a Landau-Zener (LZ) transition process modeled by a quantum two-level system (TLS) coupled to a photon mode when the bias energy is varied linearly in time. The initial state of the photon field is assumed to be a superposition of coherent states, leading to a more intricate LZ transition. Applying the rotating-wave approximation (RWA), analytical results are obtained revealing the enhancement of the LZ probability by increasing the average photon number. We also consider the creation of entanglement and the change of photon statistics during the LZ process. Without the RWA, we find some qualitative differences of the LZ dynamics from the RWA results; e.g., the average photon number no longer monotonically enhances the LZ probability. The ramifications and implications of these results are explored.
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The rotating-wave approximation may lead to faulty results.
“(iii) Refs. 33 and 34 found that the RWA may lead to faulty results.”
From Quantum speed limits in open systems: Non-Markovian dynamics without rotating-wave approximation (2015) · cites this paper as [34]
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References 52 · Cited by 35
Research works printed but not linked: 3
- [12]J.Q. You and F. Nori, Physics Today 58 (11), 42 (2005).
- [41]J. Majer et al., Nature (London) 449, 443 (2007).
- [45]L. Mandel, Opt. Lett. 4, 205 (1979).
- Authors
- Sun, Z., Ma, J., Wang, X., & Nori, F.
- Affiliations
- Hangzhou Normal University (CN)
- RIKEN (JP)
- University of Michigan (US)
- Venue
- Physical Review A
- Publisher
- American Physical Society (APS)
- Published
- 2012-07-16
- Volume
- 86
- Issue
- 1
- ISSN
- 0556-2791 (ISSN-L)
- 1050-2947
- 1094-1622
- OpenAlex
- W2072666733
- Cited by
- 35
- References
- 52
- Citations by year
- 2025: 1 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 5 · 2019: 4 · 2018: 3 · 2017: 4 · 2016: 3 · 2015: 2 · 2014: 3 · 2013: 2
- FWCI
- 1.16
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review A (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Japan Society for the Promotion of Science (22224007)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Keywords
- Landau-Zener transitions, two-level system, rotating wave approximation, average photon number, entanglement generation, photon statistics
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