Two‐Qubit Steerability, Nonlocality, and Average Steered Coherence under Classical Dephasing Channels

Abstract

When two qubits are prepared in a mixture of two Bell states and exposed to local transmission channels, the dynamics of steerability, Bell nonlocality, and average steered coherence are investigated. Disorders are assumed to influence the channels, resulting in either Markovian Ornstein-Uhlenbeck noise or non-Markovian static noise in two models: a single noisy channel or two local noisy channels. Their findings show that the type and number of classical channels, noise, and initial state must be in an optimal setting in order to preserve quantum correlations.

Classical and quantum correlations between two qubits interacting with a field in thermal spin states

“…There are several methods that have been proposed for measuring and detecting coherence in quantum systems [15]. Several studies on the characterization and analysis of coherence have been proposed through the coherence measure and have garnered a lot of interest [23][24][25][26][27][28][29][30]. From another side, coherence is susceptible to noise from the environment since any actual system must interact with it.…”

Noise‐Based Damping of Chaotic Entanglement in Pulsed Driven Two‐Qubit System

“…[36][37][38] Recently, the effects of classical and stochastic environments on quantum correlation and entanglement have been examined. [39][40][41] The primary objective of this paper is to elucidate the entanglement dynamics between two qubits under sinusoidal squared laser pulse excitation. We seek to delineate the entanglement evolution when the system is isolated or coupled to decohering environments, specifically a thermal bath or dephasing noise.…”

“…[ 36–38 ] Recently, the effects of classical and stochastic environments on quantum correlation and entanglement have been examined. [ 39–41 ]…”