arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.2549quant-ph
收藏

有限温度库中两个关联量子比特的量子不和谐的无消相干动力学

Decoherence-free dynamics of quantum discord for two correlated qubits in finite-temperature reservoirs

Lan Xu, Ji-Bing Yuan, Qing-Shou Tan, Lan Zhou, Le-Man Kuang

摘要:

利用精确可解模型研究了两个初始关联量子比特在两个有限温度库中量子不和谐的无消相干演化。我们研究了当两个量子比特初始制备在X型量子态时,耦合到两个独立欧姆库的量子比特的量子点动力学。研究发现,油藏温度对DFE动态有显著影响。我们证明了通过选择合适的双量子比特系统和库的参数来控制DFE和延长DFE时间是可能的。

英文摘要:

We investigate decoherence-free evolution (DFE) of quantum discord (QD) for two initially-correlated qubits in two finite-temperature reservoirs using an exactly solvable model. We study QD dynamics of the two qubits coupled to two independent Ohmic reservoirs when the two qubits are initially prepared in X-type quantum states. It is found that reservoir temperature significantly affects the DFE dynamics. We show that it is possible to control the DFE and to prolong the DFE time by choosing suitable parameters of the two-qubit system and reservoirs.

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。

↑