Mandilara, Aikaterini; Karpov, E.; Cerf, N. J.(2009)
According to Hudson’s theorem, any pure quantum state with a positive Wigner function is necessarily a
Gaussian state. Here, we make a step toward the extension of this theorem to mixed quantum states by finding
upper ...
Mandilara, Aikaterini; Akulin, Vladimir M.; Smilga, Andrei V.; Viola, Lorenza(2006)
We propose a general method for introducing extensive characteristics of quantum entanglement. The
method relies on polynomials of nilpotent raising operators that create entangled states acting on a reference
vacuum ...
We rederive the Schr¨odinger-Robertson uncertainty principle for the position and momentum of a quantum
particle. Our derivation does not directly employ commutation relations, but works by reduction to an eigenvalue
problem ...
Abstract We show that the self-induced transparency of optical phonons may appear in a systems consisting of a two level atoms interacting with elastic waves. The presence of the gap in phonon spectrum substantially enhances ...
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