激光与光电子学进展, 2019, 56 (24): 242703, 网络出版: 2019-11-26
直接耦合腔中通过耗散通道制备Bell态 下载: 753次
Preparing Bell State by Using Dissipative Process in Directly Coupled Cavities
摘要
提出一个在耦合腔中实现两原子间最大纠缠态的制备稳定的理论方案,其中双能级原子与两个量子化的腔场之间都是大失谐作用,同时,每个原子额外受到两个微弱经典场的非共振驱动。引入非局域的玻色膜,两个原子都与其中一个集合光腔膜发生共振,而与另一个集合光腔膜之间是大失谐。在缀饰态子空间中,通过经典场的幺正动力学和集合光腔膜的耗散通道联合作用来制备目标稳态。稳态的制备并不要求有特殊的初态,数值仿真表明,利用所提方案可以获得高保真度的Bell态,所提方案对系统参量的细微抖动具有稳健性。
Abstract
In this study, we propose a theoretical scheme for generating and stabilizing a maximally entangled state of two atoms trapped in two directly coupled cavities. Herein, two-level atoms are coupled to the two quantized cavity fields with large detuning and that each atom is subjected to non-resonant driving by two weak classical fields. By introducing nonlocal bosonic modes, we find that the two identical atoms are resonantly coupled to one of the collective optical cavity modes, whereas they are coupled to the other collective optical cavity mode with large detuning. The target steady state can be prepared using the combined effect between the unitary dynamics of the classical fields and the dissipative process of the collective optical cavity modes in the dressed-state subspaces. The steady state can be prepared without requiring any special initial state. The numerical simulation shows that the Bell state can be obtained with high fidelity and that our scheme is robust to fluctuations of the system parameters.
林杰. 直接耦合腔中通过耗散通道制备Bell态[J]. 激光与光电子学进展, 2019, 56(24): 242703. Jie Lin. Preparing Bell State by Using Dissipative Process in Directly Coupled Cavities[J]. Laser & Optoelectronics Progress, 2019, 56(24): 242703.