Noise and disturbance in quantum measurement
نویسندگان
چکیده
منابع مشابه
Topics in Quantum Measurement and Quantum Noise
In this thesis we consider primarily the dynamics of quantum systems subjected to continuous observation. In the Schrödinger picture the evolution of a continuously monitored quantum system, referred to as a ‘quantum trajectory’, may be described by a stochastic equation for the state vector. We present a method of deriving explicit evolution operators for linear quantum trajectories, and apply...
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Heisenberg’s uncertainty relation for measurement noise and disturbance states that any position measurement with noise ǫ brings the momentum disturbance not less than h̄/2ǫ. This relation holds only for restricted class of measuring apparatuses. Here, Heisenberg’s uncertainty relation is generalized to a relation that holds for all the possible quantum measurements, from which conditions are ob...
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We introduce information-theoretic definitions for noise and disturbance in quantum measurements and prove a state-independent noise-disturbance tradeoff relation that these quantities have to satisfy in any conceivable setup. Contrary to previous approaches, the information-theoretic quantities we define are invariant under the relabelling of outcomes and allow for the possibility of using qua...
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Even though measurement results obtained in the real world are generally both noisy and continuous, quantum measurement theory tends to emphasize the ideal limit of perfect precision and quantized measurement results. In this article, a more general concept of noisy measurements is applied to investigate the role of quantum noise in the measurement process. In particular, it is shown that the e...
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A.A. Clerk, M.H. Devoret, S.M. Girvin, Florian Marquardt, and R.J. Schoelkopf Department of Physics, McGill University, 3600 rue University Montréal, QC Canada H3A 2T8∗ Department of Applied Physics, Yale University PO Box 208284, New Haven, CT 06520-8284 Department of Physics, Yale University PO Box 208120, New Haven, CT 06520-8120 Department of Physics, Center for NanoScience, and Arnold Somm...
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ژورنال
عنوان ژورنال: Physics Letters A
سال: 2004
ISSN: 0375-9601
DOI: 10.1016/j.physleta.2003.11.036