| Issue |
EPL
Volume 130, Number 5, June 2020
|
|
|---|---|---|
| Article Number | 54002 | |
| Number of page(s) | 7 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/130/54002 | |
| Published online | 30 June 2020 | |
Non-Ergodicity in open quantum systems through quantum feedback
1 Joint Quantum Centre (JQC) Durham- Newcastle, School of Mathematics, Statistics and Physics, Newcastle University - Newcastle-Upon-Tyne, NE1 7RU, UK
2 The School of Mathematics, University of Leeds - Leeds, LS2 9JT, UK
3 Higgs Centre for Theoretical Physics, School of Physics and Astronomy, The University of Edinburgh Edinburgh, EH9 3JZ, UK
4 The School of Physics and Astronomy, University of Leeds - Leeds, LS2 9JT, UK
Received: 30 March 2020
Accepted: 8 June 2020
It is well known that quantum feedback can alter the dynamics of open quantum systems dramatically. In this paper, we show that non-Ergodicity may be induced through quantum feedback and resultantly create system dynamics that have lasting dependence on initial conditions. To demonstrate this, we consider an optical cavity inside an instantaneous quantum feedback loop, which can be implemented relatively easily in the laboratory. Non-Ergodic quantum systems are of interest for applications in quantum information processing, quantum metrology and quantum sensing and could potentially aid the design of thermal machines whose efficiency is not limited by the laws of classical thermodynamics.
PACS: 42.50.-p – Quantum optics / 42.50.Ar – Photon statistics and coherence theory / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps
© EPLA, 2020
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