利用绝热过程实现量子信息转移

Transfer of Quantum Information via Adiabatic Passage

基于绝热过程,仅需一个真空腔即可分别实现未知单原子态、双原子纠缠态及GHZ态的转移。在这些方案中,量子信息都存储在原子的基态,且系统仅在暗态空间中演化,原子激发态上无布居,这使得原子的自发辐射效应大大受到抑制。相比之前的方案,这些方案所需资源更少,操作更简单。另外,还讨论了其在实验上实现的可行性。

Based on adiabatic passage, transfers of an unknown state of one atom, entangled state of two atom and GHZ state are realized, where only one vacuum-cavity is needed. In these schemes, since the quantum information is encoded in atomic ground states, the system evolves in the dark state space, and there is no population in the atomic excited state, atomic spontaneous emission is suppressed effectively. Compared with previous proposals, the schemes need less resource and easier operation. In addition, the feasibility for experiment is discussed.