标题： 光子阻塞在具有非互易耦合的双腔光机械系统中 显示英文标题

标题： Photon blockade in a double-cavity optomechanical system with nonreciprocal coupling

摘要： 光子阻塞是一种生成单光子的有效方法，在量子态制备和量子信息处理中具有重要意义。 在这里，我们研究了具有非互易耦合的双腔光机械系统中光子的统计特性，并分别探讨了弱耦合和强耦合区域中的光子阻塞。 为了实现强光子阻塞，我们给出了不同阻塞机制下的最佳参数关系。 此外，我们发现，在各自机制下的光子阻塞随着非互易耦合的变化表现出完全不同的行为，并且可以在不需要过大的光机械耦合的情况下实现完美的光子阻塞，即光机械耦合远小于机械频率，这打破了传统的认知。 我们的方案为单光子源的实现提供了一个可行且灵活的平台。 显示英文摘要

摘要： Photon blockade is an effective way to generate single photon, which is of great significance in quantum state preparation and quantum information processing. Here we investigate the statistical properties of photons in a double-cavity optomechanical system with nonreciprocal coupling, and explore the photon blockade in the weak and strong coupling regions respectively. To achieve the strong photon blockade, we give the optimal parameter relations under different blockade mechanisms. Moreover, we find that the photon blockades under their respective mechanisms exhibit completely different behaviors with the change of nonreciprocal coupling, and the perfect photon blockade can be achieved without an excessively large optomechanical coupling, i.e., the optomechanical coupling is much smaller than the mechanical frequency, which breaks the traditional cognition. Our proposal provides a feasible and flexible platform for the realization of single-photon source.