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SM ISO690:2012 MIHAESCU, Tatiana; CECOI, Elena; MACOVEI, Mihai; ISAR, Aurelian. Geometric discord for a driven twoqubit system. In: Romanian Reports in Physics. 2021, nr. 1(73), pp. 116. ISSN 12211451. 
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Romanian Reports in Physics  
Numărul 1(73) / 2021 / ISSN 12211451  


Pag. 116  


Rezumat  
We employ a rescaled version of the geometric measure of quantum discord, based on the HilbertSchmidt norm, to calculate it in the steadystate for a concrete system formed of a closely packed and laserpumped pair of identical twolevel qubits being initially uncorrelated and located in their ground states, respectively. Furthermore, the qubits are longitudinally coupled with a singlemode 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. 

Cuvintecheie Geometric quantum discord 

