Interference in discrete Wigner functions
نویسندگان
چکیده
منابع مشابه
Interference in discrete Wigner functions
We analyse some features of the class of discrete Wigner functions that was recently introduced by Gibbons et al. to represent quantum states of systems with power-of-prime dimensional Hilbert spaces [Phys. Rev. A 70, 062101 (2004)]. We consider “cat” states obtained as coherent superpositions of states with positive Wigner function; for such states we show that the oscillations of the discrete...
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In quant-ph/0401155 Wootters and colaborators defined a class of discrete Wigner functions W to represent quantum states in a finite Hilbert space dimension d. I characterize a set Cd of states having non-negative W simultaneously in all definitions of W in this class. For d ≤ 5 I show Cd is the convex hull of stabilizer states. This supports the conjecture that negativity of W is necessary for...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2006
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.74.062315