One-Step Realization of SWAP Gate with Superconducting Quantum-Interference Devices and Atoms in Cavity QED

我们为 two-qubit 的一步舞实现提出了一个简单计划经由拉曼转变在洞证完与枪乌(超导的量干扰设备) 交换门。在这个计划，洞地仅仅几乎激动，因此，洞腐烂被压制。SWAP 门被使用 SQUID 系统的二个仅仅更低的流动状态认识到，激动的状态不是激动的。因此，从 SQUID 系统的层次引起的 decoherence 的效果可能被最小化。计划能也被用来与原子实现 SWAP 门。

We put forward a simple scheme for one-step realization of a two-qubit SWAP gate with SQUIDs （superconducting quantum-interference devices） in cavity QED via Raman transition. In this scheme, the cavity field is only virtually excited and thus the cavity decay is suppressed. The SWAP gate is realized by using only two lower fiux states of the SQUID system and the excited state would not be excited. Therefore, the effect of decoherence caused from the levels of the SQUID system is possibly minimized. The scheme can also be used to implement the SWAP gate with atoms.