Reduced dynamics with renormalization in solid-state charge qubit measurement

Abstract

Quantum measurement will inevitably cause backaction on the measured system, resulting in the well known dephasing and relaxation. In this report, in the context of solid--state qubit measurement by a mesoscopic detector, we show that an alternative backaction known as renormalization is important under some circumstances. This effect is largely overlooked in the theory of quantum measurement.

12 pages, 4 figures

References in corpus (5)

• Single-shot read-out of an individual electron spin in a quantum dot
• Quantum-Limited Measurement and Information in Mesoscopic Detectors
• Relaxation and Zeno effect in qubit measurements
• Spontaneous Relaxation of a Charge Qubit under Electrical Measurement
• Quantum measurement characteristics of double-dot single electron transistor