One-way Quantum Deficit and Decoherence for Two-qubit $X$ States

TL;DR

This paper provides an analytical approach to compute the one-way quantum deficit for two-qubit X states and examines its behavior under phase damping decoherence.

Contribution

It introduces a systematic analytical method for calculating the one-way quantum deficit of two-qubit X states and explores its decoherence dynamics.

Findings

Analytical formulas for one-way quantum deficit of X states.

Demonstration of decoherence effects under phase damping.

Examples illustrating the analytical results.

Abstract

We study one-way quantum deficit of two-qubit $X$ states systematically from analytical derivations. An effective approach to compute one-way quantum deficit of two-qubit $X$ states has been provided. Analytical results are presented as for detailed examples. Moreover, we demonstrate the decoherence of one-way quantum deficit under phase damping channel.