利用振荡暗态的有源量子存储器
Active Quantum Memory Using Oscillating Dark States
摘要：
提出了一种利用振荡暗态（ODS）实现原子系统中量子叠加态长时间主动存储的方法。当两对经典失谐激光场驱动三能级$Λ$组态原子系统在绝热条件下进入ODS时，系统的量子态在两个基态之间周期振荡.当考虑另一个绝热加载/卸载条件并将ODS的振荡应用于量子态存储时，令人惊讶的是，即使系统密度矩阵$γ_{21}$ $\cdot$ $t$ $ \gg$的相干项的衰减因子为1，我们也可以获得极大抑制的系统退相干和高保真度的恢复态。这种存储时间不再受原子系统相干衰减时间的限制，可以比无外加激光场的被动方案存储时间长数千倍。
英文摘要：
An active method for long time storage of quantum superposition state in atomic system using the Oscillating Dark States (ODS) is presented. Quantum state of a three-level $Λ$ configuration atomic system oscillates periodically between two ground levels, when two pairs of classical detuning laser fields driving the system into the ODS under evolving adiabatic conditions. When considering another uploading/unloading adiabatic conditions and applying the oscillation of the ODS to quantum state storage, surprisingly, we can obtain the greatly suppressed decoherence of the system and high fidelity of the retrieved state, even if decay factor of coherence term of the system density matrix $γ_{21}$$\cdot$ $t$$ \gg$1. The storage time is not limited by coherence decay time of the atomic system any longer, and can be thousands of times longer than that in those passive schemes without additional laser fields.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
