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arXiv quant-ph/0311052quant-ph
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基于原子封装的几何量子信息存储

Geometric Quantum Information Storage Based on Atomic Ensemble

C. P. Sun, P. Zhang, Y. Li

摘要:

量子信息存储(QIS)是将量子态写入量子存储器(QM)的物理过程。我们观察到,在某些一般情况下,量子态可以恢复到由非阿贝尔Berry几何相位因子(holonomy)描述的幺正变换。具有这种几何特征的光子的量子干涉可以用一个$Λ$ -原子系综的对称集体激发来实现,该系综由一个小失谐量的经典光场$δ$来控制.受控拉比频率$Ω(t)$随周期$T=\frac{2nπ}δ$的循环变化在最终光子态的不同分量中累积了额外的几何相位。然后,以纯粹的几何方式,存储的状态可以从最终状态解码。

英文摘要:

Quantum information storage (QIS) is a physical process to write quantum states into a quantum memory (QM). We observe that in some general cases the quantum state can be retrieved up to a unitary transformation depicted by the non-Abelian Berry's geometric phase factor (holonomy). The QIS of photon with this geometric character can be implemented with the symmetric collective excitations of a $Λ$-atom ensemble, which is adiabatically controlled by a classical light with a small detuning $δ$. The cyclic change of the controlled Rabi frequency $Ω(t)$ with period $T=\frac{2nπ}δ$ accumulates additional geometric phases in different components of the final photon state. Then, in a purely geometric way the stored state can be decoded from the final state.

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。

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