One-Way Deficit of Two Qubit X States

Abstract

Quantum deficit originates in questions regarding work extraction from quantum systems coupled to a heat bath [Phys. Rev. Lett. 89, 180402 (2002)]. It links quantum correlations with quantum thermodynamics and provides a new standpoint for understanding quantum non-locality. In this paper, we propose a new method to evaluate the one-way deficit for a class of two-qubit states. The dynamic behavior of the one-way deficit under decoherence channel is investigated and it is shown that the one-way deficit of the X states with five parameters is more robust against the decoherence than the entanglement.

8 pages, 1 figures

References in corpus (8)

• Necessary and sufficient condition for non-zero quantum discord
• Quantum Open System Theory: Bipartite Aspects
• Classical and quantum correlations under decoherence
• Linking Quantum Discord to Entanglement in a Measurement
• Quantum discord and geometry for a class of two-qubit states
• Quantum discord bounds the amount of distributed entanglement
• Quantum cost for sending entanglement
• The One-Way Information Deficit and Geometry for a Class of Two-qubit States

Cited by in corpus (4)

• On the quantum correlations in two-qubit XYZ spin chains with Dzyaloshinsky-Moriya and Kaplan-Shekhtman-Entin-Wohlman-Aharony interactions
• One-way Quantum Deficit and Decoherence for Two-qubit $X$ States
• Computing coherence vectors and correlation matrices, with application to quantum discord quantification
• Comment on "One-way deficit of two qubit X states"