| Issue |
EPL
Volume 122, Number 3, May 2018
|
|
|---|---|---|
| Article Number | 34001 | |
| Number of page(s) | 5 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/122/34001 | |
| Published online | 21 June 2018 | |
-symmetric photonic quantum systems with gain and loss do not exist
Institut für Physik, Universität Rostock - Albert-Einstein-Straße 23, D-18059 Rostock, Germany
Received: 11 December 2017
Accepted: 30 May 2018
We discuss the impact of gain and loss on the evolution of photonic quantum states and find that -symmetric quantum optics in gain/loss systems is not possible. Within the framework of macroscopic quantum electrodynamics we show that gain and loss are associated with non-compact and compact operator transformations, respectively. This implies a fundamentally different way in which quantum correlations between a quantum system and a reservoir are built up and destroyed.
PACS: 42.50.-p – Quantum optics / 03.65.-w – Quantum mechanics / 42.82.-m – Integrated optics
© EPLA, 2018
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