Single-photon blockade in quasichiral atom-photon interaction:
Simultaneous high purity and high efficiency
- URL: http://arxiv.org/abs/2112.14227v1
- Date: Tue, 28 Dec 2021 17:22:04 GMT
- Title: Single-photon blockade in quasichiral atom-photon interaction:
Simultaneous high purity and high efficiency
- Authors: Yu-Wei Lu, Jing-Feng Liu, Runhua Li, Haishu Tan, Yanxiong Wu, Yongyao
Li
- Abstract summary: Single-photon blockade (1PB) in the quasichiral regime of atom-photon interaction mediates via dissipative environment.
We find that in the quasichiral regime, the unconventional photon blockade (UPB) always incorporates with the conventional photon blockade (CPB) in the condition of maximum chirality.
Our work paves the way for 1PB towards practical applications and reveals the intriguing quantum-optics phenomena in the quasichiral light-matter interaction.
- Score: 1.9165601997790278
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We investigate the single-photon blockade (1PB) in the quasichiral regime of
atom-photon interaction that mediates via dissipative environment, where the
effective atom-photon interaction is asymmetrical but achiral. The synthetic
magnetic current in the closed-loop coupling breaks down the reciprocity of
atom-photon interaction, resulting in an asymmetrical and even completely
unidirectional effective coupling between two selected quantum states. As an
example, we couple the single-atom cavity-QED (cQED) system to a strongly
dissipative auxiliary cavity. We find that in the quasichiral regime, the
unconventional photon blockade (UPB) always incorporates with the conventional
photon blockade (CPB) in the condition of maximum chirality. Furthermore, we
show that 1PB in the quasichiral regime combines the advantages of UPB and CPB,
demonstrating the perfect single-photon purity, higher efficiency, smooth time
dynamics as well as lower requirement of modes coupling to achieve UPB. Our
work paves the way for 1PB towards practical applications and reveals the
intriguing quantum-optics phenomena in the quasichiral light-matter
interaction.
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