Probing quantumness with joint continuous measurements of noncommuting qubit observables
نویسندگان
چکیده
منابع مشابه
Approximate joint measurements of qubit observables
Joint measurements of qubit observables have recently been studied in conjunction with quantum information processing tasks such as cloning. Considerations of such joint measurements have until now been restricted to a certain class of observables that can be characterized by a form of covariance. Here we investigate conditions for the joint measurability of arbitrary pairs of qubit observables...
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Juan Atalaya,1 Shay Hacohen-Gourgy,2,3 Leigh S. Martin,2,3 Irfan Siddiqi,2,3 and Alexander N. Korotkov1 1Department of Electrical and Computer Engineering, University of California, Riverside, California 92521, USA 2Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA 3Center for Quantum Coherent Science, University of California, ...
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Cloning of observables, unlike standard cloning of states, aims at copying the information encoded in the statistics of a class of observables rather then on quantum states themselves. In such a process the emphasis is on the quantum operation (evolution plus measurement) necessary to retrieve the original information. We analyze, for qubit systems, the cloning of a class generated by two nonco...
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We formally prove the ultimate statement: Local realistic theories for quantum measurements could not impose the commutative algebraic structure into the set of all quantum observables even if all quantum statistics (including every quantum state and every observable) could be reproduced by local realistic theories. Thus, it turns out that the result, using a pair of projectors, by Malley et al...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2016
ISSN: 2469-9926,2469-9934
DOI: 10.1103/physreva.94.062119