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Conditional Dynamics in Heterodyne Detection of Superradiant Lasing with Incoherently Pumped Atoms
Huihui Yu1, Yuan Zhang1,2, Qilong Wu1
1Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics Ministry of Education, School of Physics and Microelectronics, <a href="https://ror.org/04ypx8c21">Zhengzhou University</a>, Daxue Road 75, Zhengzhou 450052, China.
Physical Review Letters
|August 30, 2024
Summary
This study simulates heterodyne detection of superradiant lasing using quantum trajectory theory. The findings reveal how measurements break phase symmetry, initiating atomic coherence with long-lasting phase stability.
Area of Science:
- Quantum optics
- Atomic physics
- Laser physics
Background:
- Superradiant lasing is a quantum phenomenon observed in excited atomic ensembles.
- Heterodyne detection is a sensitive method for measuring optical signals.
- Quantum trajectory theory provides a framework for simulating open quantum systems.
Purpose of the Study:
- To simulate heterodyne detection of narrow bandwidth superradiant lasing.
- To investigate the effects of measurement backaction on atomic coherence.
- To develop a theoretical framework for analyzing spectral information extraction.
Main Methods:
- Utilizing quantum trajectory theory to model the system dynamics.
- Employing second-order mean-field theory to incorporate stochastic measurement backaction.
- Simulating the process of heterodyne detection and subsequent data analysis.
Main Results:
- Demonstrated that heterodyne measurements break phase symmetry in the atomic ensemble.
- Showed that measurements initiate atomic coherence with a random phase but long temporal coherence.
- Validated the theory's ability to simulate spectral information extraction beyond the quantum regression theorem.
Conclusions:
- Quantum trajectory theory offers a powerful tool for simulating complex quantum optical experiments.
- Heterodyne detection plays a crucial role in controlling and understanding superradiant lasing dynamics.
- The developed theoretical approach enables novel methods for analyzing spectral properties of quantum light sources.
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