Dynamics of Quantum Coherence and Non-Classical Correlations in Open Quantum System Coupled to a Squeezed Thermal Bath

TL;DR

This paper studies how quantum coherence and non-classical correlations evolve in a two-qubit system interacting with a squeezed thermal bath, revealing their sensitivity to environmental effects and implications for quantum technologies.

Contribution

It provides a detailed analysis of quantum correlations dynamics in open systems coupled to squeezed thermal reservoirs, highlighting their impact on quantum metrology and teleportation.

Findings

Quantum correlations are highly sensitive to the collective regime.

Environmental interactions influence quantum coherence and correlations.

Quantitative measures inform optimization of quantum protocols.

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.