2023/06/06 by H. Z. Shen, T. Z. Luan, Y. H. Zhou +2
Computer Science · Physics and Astronomy · #Atom (system on chip) #Atomic physics #Cavity quantum electrodynamics #Interference (communication) #Mechanical and Optical Resonators #Nonlinear system #Open quantum system #Photon #Photon antibunching #Physics #Quantum #Quantum Information and Cryptography #Quantum electrodynamics #Quantum interference #Quantum mechanics #Quantum optics and atomic interactions
paper · doi:10.1142/s0219749923500296
openalex publication_date 2023/06/06 · crossref created 2023/06/06 · crossref issued 2023/06/30 · crossref published 2023/06/30 · crossref published-online 2023/06/30 · crossref deposited 2023/08/04 · crossref published-print 2023/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/06 · crossref indexed 2026/08/07
In this paper, we show that the photon blockade (PB) can be observed in a nonreciprocal way with a driven spinning atom-cavity coupled filled with [Formula: see text] nonlinear medium. We analytically derive the optimal conditions for strong photon antibunching, which are in good agreement with those obtained by numerical simulations. Under the weak driving condition, we discuss the physical origins of the nonreciprocal unconventional photon blockade (UPB), which originates from the destructive quantum interference between different paths from the ground state to two-photon states by driving the device from the left side. While the quantum interference paths are broken when the device is driven from the right side, which leads to the occurrence of the photon bunching. Moreover in the opposite direction of driving the device, we also observe another nonreciprocal UPB effect, which can occur by generating bunching and antibunching effects via driving the device from the left and right sides under the derived optimal conditions, respectively. Finally, we cannot observe the nonreciprocal UPB phenomenon with the large cavity decay compared to the atomic spontaneous emission rate (or the bad cavity limit), and give the physical reason behind it. Possible experimental implementation for this scheme is presented.