Quantum Noise in the Josephson Charge Qubit 论文

详细信息

发表期刊/会议

Physical Review Letters

发表日期

2004-12-01

发表年份

2004

摘要

We study decoherence of the Josephson charge qubit by measuring energy relaxation and dephasing with help of the single-shot readout. We found that the dominant energy relaxation process is a spontaneous emission induced by quantum noise coupled to the charge degree of freedom. Spectral density of the noise at high frequencies is roughly proportional to the qubit excitation energy.