弱耦合状态下的量子逻辑门和远距离量子态的转移（英文）

摘要

依据弱耦合状态下的量子点-腔系统,提出了1个控制Z门和1个条件相位门.利用这个控制Z门并且测量光子和第1个电子的状态,可以将这个量子态转移到第2个电子上,从而实现2个远距离量子点之间的远程量子态转移.这些方案都是在弱耦合状态下实现的,不需要对腔有严格的要求.%We propose a controlled-Z gate and a conditional phase gate based on quantum dot-cavity system in weak-coupling regime. Using the controlled-Z gate, we implement long-distance quantum state transfer between two remote quantum dots, through the measurement of the state of the photon and the first electron, the quantum state can be transferred into the second electron. Our schemes are realized in weak coupling regime and don＇t require the serious demand for the cavity.