Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.81.062116
Title: Joint measurement of two unsharp observables of a qubit
Authors: Yu, S. 
Liu, N.-L.
Li, L.
Oh, C.H. 
Issue Date: 14-Jun-2010
Source: Yu, S., Liu, N.-L., Li, L., Oh, C.H. (2010-06-14). Joint measurement of two unsharp observables of a qubit. Physical Review A - Atomic, Molecular, and Optical Physics 81 (6) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.81.062116
Abstract: We derive a single inequality as the sufficient and necessary condition for two unsharp observables of a two-level system to be jointly measurable in a single apparatus and construct explicitly the joint observables of two jointly measurable observables. By introducing a generalized distinguishability as a measure of the unsharpness of an unsharp measurement, we derive a complementarity inequality, which generalizes Englert's duality inequality, from the condition of joint measurement of two orthogonal unsharp observables. © 2010 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/53007
ISSN: 10502947
DOI: 10.1103/PhysRevA.81.062116
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