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Dynamics of quantum coherence and non-classical correlations in open quantum system coupled to a squeezed thermal bath.

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Title: Dynamics of quantum coherence and non-classical correlations in open quantum system coupled to a squeezed thermal bath.
Authors: Pathania, Neha1 (AUTHOR) neha@ctp-jamia.res.in, Meena, Ramniwas1 (AUTHOR) meena.53@iitj.ac.in, Banerjee, Subhashish1 (AUTHOR) subhashish@iitj.ac.in
Source: Physica A. Apr2026, Vol. 688, pN.PAG-N.PAG. 1p.
Subjects: Quantum coherence, Decoherence (Quantum mechanics), Quantum teleportation, Quantum information theory, Squeezed light
Abstract: We investigate the intricate dynamics of quantum coherence and non-classical correlations in a two-qubit open quantum system coupled to a squeezed thermal reservoir. By exploring the correlations between spatially separated qubits, we unravel the complex interplay between quantum correlations and decoherence induced by the reservoir. Our findings demonstrate that non-classical correlations such as quantum consonance, quantum discord, local quantum uncertainty, and quantum Fisher information are highly sensitive to the collective regime. These insights identify key parameters for optimizing quantum metrology and parameter estimation in systems exposed to environmental interactions. Furthermore, we quantify these quantum correlations in the context of practical applications such as quantum teleportation, using the two metrics viz. maximal teleportation fidelity and fidelity deviation. This work bridges theoretical advancements with real-world applications, offering a comprehensive framework for leveraging quantum resources under the influence of environmental decoherence. • Non-classical correlations studied in two-qubit systems with squeezed thermal bath. • Quantum Consonance surpasses concurrence as the dominant non-classical correlation. • Quantum Fisher Information reveals enhanced sensitivity in the collective regime. • Increasing squeezing parameter leads to the degradation of correlation functions. • Quantum Teleportation is sustainable in the collective regime. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:We investigate the intricate dynamics of quantum coherence and non-classical correlations in a two-qubit open quantum system coupled to a squeezed thermal reservoir. By exploring the correlations between spatially separated qubits, we unravel the complex interplay between quantum correlations and decoherence induced by the reservoir. Our findings demonstrate that non-classical correlations such as quantum consonance, quantum discord, local quantum uncertainty, and quantum Fisher information are highly sensitive to the collective regime. These insights identify key parameters for optimizing quantum metrology and parameter estimation in systems exposed to environmental interactions. Furthermore, we quantify these quantum correlations in the context of practical applications such as quantum teleportation, using the two metrics viz. maximal teleportation fidelity and fidelity deviation. This work bridges theoretical advancements with real-world applications, offering a comprehensive framework for leveraging quantum resources under the influence of environmental decoherence. • Non-classical correlations studied in two-qubit systems with squeezed thermal bath. • Quantum Consonance surpasses concurrence as the dominant non-classical correlation. • Quantum Fisher Information reveals enhanced sensitivity in the collective regime. • Increasing squeezing parameter leads to the degradation of correlation functions. • Quantum Teleportation is sustainable in the collective regime. [ABSTRACT FROM AUTHOR]
ISSN:03784371
DOI:10.1016/j.physa.2026.131405