Decoherence of flux qubits under Sub-Ohmic bath

摘要：

　　In two-level approximation,we investigate the influence of mutual inductive coupling in superconducting quantum circuits on the decoherence of flux qubits under sub-Ohmic thermal bath environment by utilizing Bloch-Redfield function.The investigation results show:(1) The memory effect existing in the solid-state environment is beneficial to prolong the decoherence time of the superconducting flux qubit,building sub-Ohmic thermal bath environments can improve the decoherence ofthe solid-state qubit.(2) When the quantum system and the thermal bath are in weak coupling,generally speaking,the mutual coupling effect between circuit elements will destroy the quantum coherence; but when the quantum system and the thermal bath are in strong coupling,it will help to enhance the decoherence time by controlling the mutual inductive coupling between the loop components.

关键词： Flux qubit Sub-Ohmic bath Decoherence

作者: Yang De Fang

作者单位: Shang rao Radio & TV University, Shangrao, 334000, China

会议类型: 国际会议

会议名称: 2nd International Conference on Polymer Composities and Polymer Testing (2013第二届高分子复合材料与高分子测试国际会议暨先进工业技术与方案国际会议)(ISPCPT2013)

会议地点: 太原

会议语种:英文

页码: 602-606

在线出版日期: 2013-03-22（万方平台首次上网日期，不代表论文的发表时间）