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Brillouin super-cooling/heating in a non-Hermitian phononic dimer
Yicheng Zhu1, Boyi Xue1, Yuncong Sun1
1State Key Laboratory of Photonics and Communications, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China.
Summary
Researchers achieved synchronized super-cooling and super-heating in non-Hermitian phononic systems using light. This breakthrough enables coherent control over quantum systems for advanced metrology and sensing applications.
Area of Science:
- Quantum physics and optics
- Condensed matter physics
- Nanoscale systems engineering
Background:
- Coherent manipulation of phonons via light is crucial for quantum technologies.
- Microscale quantum systems are often non-Hermitian due to external energy exchange.
- Controlling cooling and heating rates in these systems is challenging.
Purpose of the Study:
- To experimentally observe and demonstrate a super-cooling/heating state in a non-Hermitian phononic dimer.
- To investigate the synchronous behavior of phonon modes with distinct cooling/heating rates.
- To explore the role of Parity-Time symmetry in controlling these phenomena.
Main Methods:
- Experimental setup involving a non-Hermitian phononic dimer.
- Utilizing two counterpropagating optical pumps to control the system.
- Observing phonon modes and their cooling/heating rates.
Main Results:
- Observed a novel super-cooling/heating state where distinct phonon modes synchronize.
- Demonstrated that this synchronous state is linked to a Parity-Time symmetric regime.
- Confirmed the non-Hermitian nature of the phononic dimer through experimental observation.
Conclusions:
- The study reveals a coherent technique for synchronous cooling/heating in non-Hermitian systems.
- This provides a method to control quantum states in challenging non-Hermitian environments.
- Opens avenues for practical applications in quantum sensing, metrology, and information processing.
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