Interferometric power of gaussian systems in a squeezed thermal bath
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MÎRZAC, Alexandra; MIHAESCU, Tatiana; MACOVEI, Mihai; ISAR, Aurelian. Interferometric power of gaussian systems in a squeezed thermal bath. In: Romanian Journal of Physics. 2020, nr. 1-2(65), p. 0. ISSN 1221-146X.
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Romanian Journal of Physics
Numărul 1-2(65) / 2020 / ISSN 1221-146X

Interferometric power of gaussian systems in a squeezed thermal bath


Pag. 0-0

Mîrzac Alexandra1, Mihaescu Tatiana2, Macovei Mihai1, Isar Aurelian2
 
1 Institute of Applied Physics,
2 Horia Hulubei National Institute of Physics and Nuclear Engineering
 
Disponibil în IBN: 7 aprilie 2020


Rezumat

We describe the Markovian dynamics of the Gaussian interferometric power of two-mode Gaussian states, for a system composed of two bosonic modes, each one interacting with its squeezed thermal bath, in the framework of the theory of open systems based on completely positive quantum dynamical semigroups. The time evolution of the interferometric power is described in terms of the covariance matrix for Gaussian initial states. The behaviour of the Gaussian interferometric power depends on the initial state of the subsystem (squeezing parameter and thermal photon num-bers) and on the parameters characterizing the squeezed thermal reservoirs (tempera-tures, dissipation coefficient, squeezed parameters of the baths and squeezing angle). We show that, independently of the initial state, the Gaussian interferometric power is monotonically decreasing in time, and in the limit of large times it asymptotically decreases to a zero value.

Cuvinte-cheie
Gaussian states, Open systems, Quantum interferometric power, Squeezed thermal baths