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Phys. Scr., 2015, Volume 90, Issue 5, 55101, 13 pages (Mi phscr7)  

Tomographic discord for a system of two coupled nanoelectric circuits

A. K. Fedorovab, E. O. Kiktenkoac, O. V. Man'kod, V. I. Man'kod

a Bauman Moscow State Technical University, Moscow 105005, Russi
b Russian Quantum Center, Skolkovo, Moscow 143025, Russia
c Geoelectromagnetic Research Center of the Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Troitsk, Moscow Region 142190, Russia
d P.N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow 119991, Russia

Abstract: We consider quantum correlations and quantum discord phenomena for two-qubit states with X-type density matrices in the tomographic framework of quantum mechanics. By introducing different measurement schemes, we establish the relation between the tomographic approaches to quantum discord, symmetric discord, and measurement-induced disturbance. In our consideration, X-states appear as approximations of ground and low temperature thermal states of two coupled harmonic oscillators realized by nanoelectric LC-circuits. Possibilities for controlling the amounts of correlations and entropic asymmetry due to variation of the frequency detuning and the coupling constant are also considered.

Funding Agency Grant Number
Dynasty Foundation
Ministry of Education and Science of the Russian Federation SP-961.2013.5
Russian Foundation for Basic Research 14-08-00606
This work was supported by the Dynasty Foundation, the Council for Grants of the President of the Russian Federation (grant SP-961.2013.5, E.O.K.), and the Russian Foundation for Basic Research (grant 14-08-00606).


DOI: https://doi.org/10.1088/0031-8949/90/5/055101


Bibliographic databases:

Document Type: Article
Received: 24.10.2014
Accepted:12.02.2015
Language: English

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