Nonreciprocal Amplification Transition in a Driven-Dissipative Quantum
Network
- URL: http://arxiv.org/abs/2207.06889v1
- Date: Thu, 14 Jul 2022 13:07:27 GMT
- Title: Nonreciprocal Amplification Transition in a Driven-Dissipative Quantum
Network
- Authors: Mingsheng Tian, Fengxiao Sun, Kaiye Shi, Haitan Xu, Qiongyi He, Wei
Zhang
- Abstract summary: We study the transport properties of a driven-dissipative quantum network.
Multiple bosonic cavities are coupled through a nonreciprocal bus with unidirectional transmission.
- Score: 3.32634590232003
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We study the transport properties of a driven-dissipative quantum network,
where multiple bosonic cavities such as photonic microcavities are coupled
through a nonreciprocal bus with unidirectional transmission. For short-range
coupling between the cavities, the occurrence of nonreciprocal amplification
can be linked to a topological phase transition of the underlying dynamic
Hamiltonian. However, for long-range coupling, we find that the nonreciprocal
amplification transition deviates drastically from the topological phase
transition. Nonetheless, we show that the nonreciprocal amplification
transition can be connected to the emergence of zero-energy edge states of an
auxiliary Hamiltonian with chiral symmetry even in the long-range coupling
limit. We also investigate the stability, the crossover from short to
long-range coupling, and the bandwidth of the nonreciprocal amplification. Our
work has potential application in signal transmission and amplification, and
also opens a window to non-Hermitian systems with long-range coupling and
nontrivial boundary effects.
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