Robust thermal correlations induced by spin–orbit interactions

Khedr, Ahmad N.; Homid, A. H.; Mohamed, Abdel‐Baset A.; Abdel‐Aty, Abdel‐Haleem; Eleuch, Hichem; Tammam, Mahmoud; Abdel‐Aty, Mahmoud

doi:10.1016/j.rinp.2022.105619

Cited by 4 publications

(1 citation statement)

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“…On the other hand, the notion of skew information has been proposed as a quantifier of noncommutativity between a considered quantum state and a local observable [28,29], and the local quantum uncertainty (LQU) has been introduced in [30] as a quantum skew-information correlations quantifier. LQU is extensively investigated in the literature (see for example [31][32][33][34][35][36]).…”

Section: Introductionmentioning

confidence: 99%

Quantum correlations and thermal coherence in a two-superconducting charge qubit system

Benzahra,

Mansour,

Oumennana

et al. 2023

Laser Phys.

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Superconducting charge qubits represent a cutting-edge technology in the field of quantum computing, offering a promising platform for quantum processing. This study delves into the behaviors of thermal coherence and quantum correlations within a two-superconducting charge qubit system coupled by a fixed capacitance. Specifically, we investigate the effects of thermal noise on entanglement (measured by concurrence), nonclassical correlations (quantified by local quantum uncertainty), and quantum coherence (measured by correlated coherence) within the two-superconducting charge qubit capacitively coupled. Our analysis takes into account the interplay between the equilibrium temperature of the reservoir and various system parameters. Our findings demonstrate that an increase in temperature leads to a decrease in coherence and quantum correlations within the considered system. However, the behavior of these quantum resources is heavily dependent on the system parameters, and a careful selection of these parameters can help mitigate the negative effects of absolute temperature. Additionally, we observe that local quantum uncertainty and correlated coherence are more resilient than thermal entanglement to rising temperatures. These results provide insight into how a two-superconducting charge qubit system can be optimized for achieving quantum advantages.

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