利用绝热过程实现量子信息转移

Quantum information transfer via adiabatic passage

提出一种利用绝热过程实现量子信息转移的方案.Λ型原子和经典场、单模腔场发生相互作用,系统的绝热演化在暗态中进行.利用这种绝热演化可实现Λ型原子间的所有量子信息的转移.用相似的方法还可实现腔场间的量子信息转移.本方案可有效地抑制原子的自发辐射,成功地实现量子信息转移.

We propose a relatively robust scheme to implement quantum information transfer via adiabatic passage. When a ∧-type atom interacts with laser and cavity fields adiabatically, the state of the system evolves in a dark state. By the adiabatic passage, we can implement quantum information transfer of all the atomic states. Similarly, the scheme can be used to transfer a cavity mode state. The proposal is robust to restrain the atomic spontaneous emission noise, and transfers quantum information successfully.