Geometric discord for a driven two-qubit system

Mihaescu Tatiana; Cecoi Elena; Macovei Mihai; Isar Aurelian

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MIHAESCU, Tatiana, CECOI, Elena, MACOVEI, Mihai, ISAR, Aurelian. Geometric discord for a driven two-qubit system. In: Romanian Reports in Physics, 2021, vol. 73, pp. 1-16. ISSN 1221-1451.

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Romanian Reports in Physics

Volumul 73 / 2021 / ISSN 1221-1451

Geometric discord for a driven two-qubit system

Pag. 1-16

Mihaescu Tatiana¹², Cecoi Elena³, Macovei Mihai³, Isar Aurelian¹²

¹ Horia Hulubei National Institute of Physics and Nuclear Engineering,
² University of Bucharest,
³ Institute of Applied Physics

Disponibil în IBN: 8 aprilie 2021

Rezumat

We employ a rescaled version of the geometric measure of quantum discord, based on the Hilbert-Schmidt norm, to calculate it in the steady-state for a concrete system formed of a closely packed and laser-pumped pair of identical two-level qubits being initially uncorrelated and located in their ground states, respectively. Furthermore, the qubits are longitudinally coupled with a single-mode boson field, while both subsystems are damped via their corresponding environmental reservoirs. Although the employed metric is still noncontractive under quantum operations, it was shown previously in a series of physical examples that this measure of quantum correlations is in agreement with other discord measures.

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Geometric quantum discord

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