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Demonstrates enhanced photon blockade in quantum systems, suggesting improved photon source technology.
High‐performance unidirectional and directional single‐photon sources characterized by high purity and brightness are crucial in quantum networks. In this work, photon blockade has been demonstrated with maximized mean photon number in the emitter, cavity and two‐field driving Jaynes–Cummings models using two‐photon dissipation. The results show that the two‐photon dissipation process effectively enhance the antibunching effect, thereby reducing the necessity for sufficiently strong coupling strengths and enabling the realization of photon blockade at points of maximized mean photon number. Based on prior study, nonreciprocal photon blockade via chiral coupling is proposed in conjunction with two‐photon dissipation under different driving configurations. The results indicate that nonreciprocal photon blockade emerges in both cavity and two‐field driving cases, but is absent in the emitter driving case. Under cavity driving, the nonreciprocal photon blockade accompanies with relatively higher mean photon number. Under two‐field driving, additional advantages are observed. First, the nonreciprocal photon blockade can be obtained independently in both driving directions. Second, the effect is stronger compared to that under cavity driving. Third, it operates effectively over relatively broader continuous frequency ranges. This work is meaningful for the development of high‐performance single‐photon sources and nonreciprocal single‐photon devices in simple cavity quantum electrodynamics systems.
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