局域双稳态杂质对超导量子比特纠缠动力学的影响
Entanglement dynamics in superconducting qubits affected by local bistable impurities
摘要：
研究了两个独立的超导量子比特在纯退相时受产生随机电报噪声（RTN）的双稳态杂质影响的纠缠动力学。相关参数是量子位-RTN耦合强度与RTN切换速率之间的比率$g$，其捕获动态的马尔可夫特征与非马尔可夫特征之间的交叉的物理。对于相同的量子比特RTN子系统，交叉参数的阈值$g_\mathrm{th}$将指数衰减和复苏的开始分开;通过改变RTN的初始条件，还显示出不同的定性行为。此外，我们表明，对于不同的量子比特RTN子系统，当两个量子比特都非常强耦合到RTN的纠缠恢复幅度的增加可能会发生在动态。
英文摘要：
We study the entanglement dynamics for two independent superconducting qubits each affected by a bistable impurity generating random telegraph noise (RTN) at pure dephasing. The relevant parameter is the ratio $g$ between qubit-RTN coupling strength and RTN switching rate, that captures the physics of the crossover between Markovian and non-Markovian features of the dynamics. For identical qubit-RTN subsystems, a threshold value $g_\mathrm{th}$ of the crossover parameter separates exponential decay and onset of revivals; different qualitative behaviors also show up by changing the initial conditions of the RTN. We moreover show that, for different qubit-RTN subsystems, when both qubits are very strongly coupled to the RTN an increase in entanglement revival amplitude may occur during the dynamics.
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。
