Geometric discord for a driven two-qubit system
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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, nr. 1(73), pp. 1-16. ISSN 1221-1451.
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Romanian Reports in Physics
Numărul 1(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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<dc:creator>Mihaescu, T.</dc:creator>
<dc:creator>Cecoi, E.</dc:creator>
<dc:creator>Macovei, M.A.</dc:creator>
<dc:creator>Isar, A.</dc:creator>
<dc:date>2021-03-01</dc:date>
<dc:description xml:lang='en'><p>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.&nbsp;</p></dc:description>
<dc:source>Romanian Reports in Physics 73 (1) 1-16</dc:source>
<dc:subject>Geometric quantum discord</dc:subject>
<dc:title><p>Geometric discord for a driven two-qubit system</p></dc:title>
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