Tomographic discord for a system of two coupled nanoelectric circuits
A K Fedorov, Evgeniy O. Kiktenko, O V Man’ko, V I Man’ko · Physica Scripta · 2015
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.