Brillouin super-cooling/heating in a non-Hermitian phononic dimer
Abstract
The ability to coherently manipulate phonons through light permits cooling and heating microscale quantum systems for various critical fields in metrology, information processing, and sensing. However, these physical systems often are hard to isolate and open for exchanging energy externally, making themselves non-Hermitian. Here, we experimentally observe a super-cooling/heating state in a non-Hermitian phononic dimer, where the two independent phonon modes of distinct cooling/heating rates become synchronous in cooling/heating. Such super cooling/heating is manifested in a Parity–Time symmetric state controlled by two counterpropagating optical pumps. These results reveal the non-Hermitian nature of the phonon dimer and illustrate a coherent technique for synchronous cooling/heating non-Hermitian systems, paving the way for practical applications in quantum sensing and metrology.
Article Details
Journal Info
Proceedings of the National Academy of Sciences
National Academy of Sciences
Authors (9)
Yicheng Zhu
State Key Laboratory of Photonics and Communications, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University
Boyi Xue
State Key Laboratory of Photonics and Communications, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University
Yuncong Sun
State Key Laboratory of Photonics and Communications, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University
Qi Geng
State Key Laboratory of Photonics and Communications, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University
Yuping Chen
Xianfeng Chen
Department of Physics and Astronomy, Shanghai Jiao Tong University
Xiaoshun Jiang
National Laboratory of Solid State Microstructures, College of Engineering and Applied Science and School of Physics, Nanjing University
Li Ge
Department of Physics and Astronomy, College of Staten Island, The City University of New York
Wenjie Wan
State Key Laboratory of Photonics and Communications, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University