arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0812.5067cond-mat.stat-mechquant-ph
收藏

与量子比特耦合的玻色-爱因斯坦凝聚体的混沌动力学

Chaotic dynamics of a Bose-Einstein condensate coupled to a qubit

J. Martin, B. Georgeot, D. L. Shepelyansky

摘要:

利用Gross-Pitaevskii方程,数值研究了在受踢光晶格中运动的玻色-爱因斯坦凝聚体与量子比特的耦合。在BEC尺寸小于晶格周期的区域,BEC的混沌动力学被量子比特态有效地控制。非线性混沌BEC动力学的反馈效应在强BEC非线性区域中保持量子比特的相干性和纯度。这给出了通过内部量子比特状态对宏观状态进行指数敏感控制的示例。在弱非线性下,量子混沌导致量子比特的快速动力学退相干。这种耦合系统的实现是在目前的实验技术范围内。

英文摘要:

We study numerically the coupling between a qubit and a Bose-Einstein condensate (BEC) moving in a kicked optical lattice, using Gross-Pitaevskii equation. In the regime where the BEC size is smaller than the lattice period, the chaotic dynamics of the BEC is effectively controlled by the qubit state. The feedback effects of the nonlinear chaotic BEC dynamics preserve the coherence and purity of the qubit in the regime of strong BEC nonlinearity. This gives an example of an exponentially sensitive control over a macroscopic state by internal qubit states. At weak nonlinearity quantum chaos leads to rapid dynamical decoherence of the qubit. The realization of such coupled systems is within reach of current experimental techniques.

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。

↑