Classical Field Approach to Quantum Weak Measurements
نویسندگان
چکیده
منابع مشابه
Classical field approach to quantum weak measurements.
By generalizing the quantum weak measurement protocol to the case of quantum fields, we show that weak measurements probe an effective classical background field that describes the average field configuration in the spacetime region between pre- and postselection boundary conditions. The classical field is itself a weak value of the corresponding quantum field operator and satisfies equations o...
متن کاملQuantum feedback with weak measurements
The problem of feedback control of quantum systems by means of weak measurements is investigated in detail. When weak measurements are made on a set of identical quantum systems, the single-system density matrix can be determined to a high degree of accuracy while affecting each system only slightly. If this information is fed back into the systems by coherent operations, the single-system dens...
متن کاملHybrid quantum-classical approach to correlated materials
Bela Bauer, Dave Wecker, Andrew J. Millis, Matthew B. Hastings, 2 and Matthias Troyer Station Q, Microsoft Research, Santa Barbara, CA 93106-6105, USA Quantum Architectures and Computation Group, Microsoft Research, Redmond, WA 98052, USA Department of Physics, Columbia University in the City of New York, New York, NY 10027 Theoretische Physik and Station Q Zurich, ETH Zurich, 8093 Zurich, Swit...
متن کاملA Quantum Approach to Classical Statistical Mechanics
We present a new approach to study the thermodynamic properties of d-dimensional classical systems by reducing the problem to the computation of ground state properties of a d-dimensional quantum model. This classical-to-quantum mapping allows us to deal with standard optimization methods, such as simulated and quantum annealing, on an equal basis. Consequently, we extend the quantum annealing ...
متن کاملWhat do quantum “ weak ” measurements actually measure ?
A precise definition of “weak [quantum] measurements” and “weak value” (of a quantum observable) is offered, and simple finite dimensional examples are given showing that weak values are not unique and therefore probably do not correspond to any physical attribute of the system being “weakly” measured, contrary to impressions given by most of the literature on weak measurements. A possible math...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2014
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.112.110407