Graph states in phase space
نویسندگان
چکیده
منابع مشابه
Sampling quantum phase space with squeezed states.
We study the application of squeezed states in a quantum optical scheme for direct sampling of the phase space by photon counting. We prove that the detection setup with a squeezed coherent probe field is equivalent to the probing of the squeezed signal field with a coherent state. An example of the Schr odinger cat state measurement shows that the use of squeezed states allows one to detect cl...
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The name ‘graph state’ is used to describe a certain class of pure quantum state which models a physical structure on which one can perform measurement-based quantum computing, and which has a natural graphical description. We present the two-graph state, this being a generalisation of the graph state and a two-graph representation of a stabilizer state. Mathematically, the two-graph state can ...
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Let E(x), for x in a 2d-dimensional phase space, be an ir-reducible Weyl system, and : IR + ! IR + a convex function with (0) = 0. We discuss the maximum of R dx ? jh'; E(x)ij 2 with respect to unit vectors ';. When (t) = t p with 1 < p < 1 the maximum is attained if and only if ' and are coherent states with respect to the same quadratic form. We show that this statement is not correct for mor...
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We present a complete derivation of the semiclassical limit of the coherent-state propagator in one dimension, starting from path integrals in phase space. We show that the arbitrariness in the path integral representation, which follows from the overcompleteness of the coherent states, results in many different semiclassical limits. We explicitly derive two possible semiclassical formulae for ...
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ژورنال
عنوان ژورنال: Journal of Physics A: Mathematical and Theoretical
سال: 2012
ISSN: 1751-8113,1751-8121
DOI: 10.1088/1751-8113/45/21/215303