Reduced dynamics with renormalization in solid-state charge qubit measurement

Quantum measurement will inevitably cause backaction on the measured system, resulting in the well-known dephasing and relaxation. In this paper, in the context of solid-state qubit measurement by a mesoscopic detector, we show that an alternative backaction known as renormalization is important und...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2009-09, Vol.21 (38), p.385801-385801 (5)
Main Authors: Luo, Jun Yan, Jiao, Hujun, Li, Feng, Li, Xin-Qi, Yan, Yi Jing
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Physics
Quantum computation
Quantum information
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Summary:Quantum measurement will inevitably cause backaction on the measured system, resulting in the well-known dephasing and relaxation. In this paper, 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.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/21/38/385801