Nonexponential quantum decay under environmental decoherence
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A system prepared in an unstable quantum state generally decays following an exponential law, as environmental decoherence is expected to prevent the decay products from recombining to reconstruct the initial state. Here we show the existence of deviations from exponential decay in open quantum systems under very general conditions. Our results are illustrated with the exact dynamics under quantum Brownian motion and suggest an explanation of recent experimental observations.
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The quantum speed limit time sets the time-scale over which decoherence is effective.
“Finally, it is worth noting that the quantum speed limit time also sets the time-scale over which decoherence is effective [30,156,157].”
From Quantum speed limits: from Heisenberg’s uncertainty principle to optimal quantum control (2017) · cites this paper as [157]
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References 51 · Cited by 70
- Authors
- Beau, M., Kiukas, J., Egusquiza, I. L., & del Campo, A.
- Affiliations
- Dublin Institute For Advanced Studies (IE)
- Aberystwyth University (GB)
- University of the Basque Country (ES)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2017-09-27
- Volume
- 119
- Issue
- 13
- Pages
- 130401-130401
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2667520185
- Cited by
- 70
- References
- 51
- Citations by year
- 2026: 9 · 2025: 5 · 2024: 7 · 2023: 11 · 2022: 9 · 2021: 7 · 2020: 10 · 2019: 2 · 2018: 9 · 2017: 1
- FWCI
- 2.93
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- University of Massachusetts Boston (P20150000029279)
- European Social Fund (POLATOM-5052)
- John Templeton Foundation
- Ministerio de Economía y Competitividad
- Federación Española de Enfermedades Raras (FIS2015-69983-P)
- Eusko Jaurlaritza (IT986-16)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Quantum chaos and dynamical systems
- Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Advanced Thermodynamics and Statistical Mechanics
- Keywords
- non-exponential decay, quantum decay, environmental decoherence, open quantum systems, quantum Brownian motion, exact dynamics
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