Influence of low-frequency noise on macroscopic quantum tunneling in superconducting circuits
Influence of low-frequency noise on macroscopic quantum tunneling in superconducting circuits
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DOI：
10.1103/physrevb.71.134501
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发表时间：
2004-11
影响因子：
3.7
通讯作者：
M. Duckheim;J. Ankerhold
中科院分区：
文献类型：
--
作者：
M. Duckheim;J. Ankerhold
本文研究了低至中频环境对超导电路中宏观量子隧穿（MQT）的影响，并采用$\ mathm {Im}F$方法来计算隧穿速率。特别注意两种模型环境，即纯缓速浴和附加$1∕f$噪声的缓速浴。一般研究结果应用于齐纳翻转隧道，这是一种最近在实现量子比特的超导电路中预测和观察到的MQT现象。
The influence of low- to moderate-frequency environments on macroscopic quantum tunneling (MQT) in superconducting circuits is studied within the $\mathrm{Im}F$ approach to evaluate tunneling rates. Particular attention is paid to two model environments, namely, a pure sluggish bath and a sluggish bath with additional $1∕f$ noise. General findings are applied to Zener flip tunneling, a MQT phenomenon recently predicted and observed in a superconducting circuit implementing a quantum bit.