利用锁相控制光子存储时间。
Control of photon storage time using phase locking.
作者信息
Ham Byoung S
机构信息
Center for Photon Information Processing, Department of Electrical Engineering, and Graduate School of Information and Telecommunications, Inha University, Incheon, South Korea.
出版信息
Opt Express. 2010 Jan 18;18(2):1704-13. doi: 10.1364/OE.18.001704.
A photon echo storage-time extension protocol is presented by using a phase locking method in a three-level backward propagation scheme, where phase locking serves as a conditional stopper of the rephasing process in conventional two-pulse photon echoes. The backward propagation scheme solves the critical problems of extremely low retrieval efficiency and pi rephasing pulse-caused spontaneous emission noise in photon echo based quantum memories. The physics of the storage time extension lies in the imminent population transfer from the excited state to an auxiliary spin state by a phase locking control pulse. We numerically demonstrate that the storage time is lengthened by spin dephasing time.
通过在三能级反向传播方案中使用锁相方法，提出了一种光子回波存储时间扩展协议，其中锁相作为传统双脉冲光子回波中重相过程的条件终止器。反向传播方案解决了基于光子回波的量子存储器中极低检索效率和π重相脉冲引起的自发发射噪声等关键问题。存储时间扩展的物理原理在于通过锁相控制脉冲使激发态到辅助自旋态的即时粒子转移。我们通过数值证明存储时间因自旋退相时间而延长。
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