标题： 频率失谐的自旋磁振子系统中的磁振子阻塞 显示英文标题

标题： Magnon blockade in spin-magnon systems with frequency detuning

摘要： 磁子阻塞是一种用于制备单磁子源的物理机制，在量子信息处理中有重要的应用。 在这里，我们提出了一种在自旋-磁子量子系统中产生最优磁子阻塞的方案。 通过在磁子和NV中心的自旋量子比特之间引入频率失谐，可以在强耦合和弱耦合下分别获得传统的磁子阻塞和非传统的磁子阻塞，从而降低了对耦合强度的要求。 此外，当磁子和自旋量子比特同时被驱动时，传统和非传统的磁子阻塞可以同时发生。 这使得等时间二阶关联函数达到$10^{-8}$，比之前的工作低大约五个数量级。 此外，时间延迟的二阶关联函数避免了振荡。 我们的研究展示了频率失谐对磁子阻塞的影响，并提出了通过频率失谐增强磁子阻塞和降低耦合强度要求的方法。 显示英文摘要

摘要： Magnon blockade is a physical mechanism for the preparation of a single-magnon source, which has important applications in quantum information processing. Here we propose a scheme for generating an optimal magnon blockade in the spin-magnon quantum system. By introducing frequency detuning between the magnon and the spin qubit of the NV center, the conventional magnon blockade and the unconventional magnon blockade can be obtained under both strong and weak coupling, relaxing the requirements for coupling strength. Moreover, the conventional and unconventional magnon blockade can occur simultaneously when both the magnon and the spin qubit are driven. This allows the equal-time second-order correlation function to reach $10^{-8}$, about five orders of magnitude lower than that in previous works. Additionally, the time-delayed second-order correlation function avoids oscillation. Our study demonstrates the impact of frequency detuning on the magnon blockade and proposes methods to enhance the magnon blockade and relax the requirements for coupling strength through frequency detuning.