Effects of Dipole-Dipole Interaction and Time-Dependent Coupling on the Evolution of Entanglement and Quantum Coherence for Superconducting Qubits in a Nonlinear Field System

Berrada, K.; Algarni, Mariam; Marín, Marín; Abdel‐Khalek, S.

doi:10.3390/sym15030732

Cited by 1 publication

(1 citation statement)

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“…Superconducting qubits are highly compatible with existing fabrication techniques, but they require very low temperatures (on the order of mK). Furthermore, various studies investigated quantum correlations and quantum coherence within superconducting qubits [60][61][62][63][64][65][66][67][68].…”

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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