Spontaneous Relaxation of a Charge Qubit under Electrical Measurement
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In this work we first derive a generalized conditional master equation for quantum measurement by a mesoscopic detector, then study the readout characteristics of qubit measurement where a number of new features are found. The work would in particular highlight the qubit spontaneous relaxation effect induced by the measurement itself rather than an external thermal bath.
4 pages, 2 figures; an error in Eq.(8) is corrected
4 pages, 2 figures; an error in Eq.(8) is corrected