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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Reservoir-Mediated Quantum Correlations in Non-Hermitian Optical System
Wanxia Cao1, Xingda Lu1, Xin Meng1
1Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200433, China.
Physical Review Letters
|February 8, 2020
Summary
This study demonstrates how dissipative coupling in non-Hermitian systems can create quantum correlations between distant optical channels. This novel approach bridges atomic physics, non-Hermitian optics, and quantum information for new applications.
Area of Science:
- Quantum optics
- Non-Hermitian physics
- Atomic physics
Background:
- Non-Hermitian systems exhibit unique phenomena due to gain and loss.
- Dissipative coupling often leads to classical behavior, obscuring quantum effects.
- Existing methods struggle to maintain quantum phenomena in dissipative systems.
Purpose of the Study:
- To propose and demonstrate a method for achieving quantum correlations using dissipative coupling.
- To explore quantum phenomena in non-Hermitian systems by engineering reservoir interactions.
- To bridge atomic physics, non-Hermitian optics, and quantum information.
Main Methods:
- Designing two optical channels to interact with a common reservoir environment.
- Utilizing an anti-parity-time-symmetric setting with hot, coherent atoms.
- Implementing a non-Hermitian nonlinear phase-sensitive parametric process.
Main Results:
- Achieved quantum correlations between two distant light beams.
- Observed these correlations in the symmetry-unbroken phase, driven by atomic motion.
- Demonstrated a novel non-Hermitian nonlinear parametric process.
Conclusions:
- Dissipative coupling can be harnessed to generate quantum correlations, contrary to classical expectations.
- This work opens new avenues for exploring non-Hermitian quantum phenomena.
- Potential applications include quantum light sources, information processing, and sensing.
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