Local available quantum correlations of non-symmetric X states

• URL: http://arxiv.org/abs/2204.07552v2
• Date: Mon, 13 Jun 2022 16:02:16 GMT
• Title: Local available quantum correlations of non-symmetric X states
• Authors: David Bellorin and Hermann Albrecht and Douglas F. Mundarain
• Abstract summary: Local available quantum correlations (LAQC) are analyzed for non-symmetric 2-qubit X states. A simple analytic expression for their LAQC quantifier is obtained.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Local available quantum correlations (LAQC), as defined by Mundarain et al., are analyzed for non-symmetric 2-qubit X states, that is, X-states that are not invariant under the exchange of subsystems and therefore have local Bloch vectors whose norms are different. A simple analytic expression for their LAQC quantifier is obtained. As an example, we analyze the local application of the amplitude damping channel for Werner states and general X states. Although this local quantum channel can create quantum discord in some cases, no such outcome is possible for LAQC, which hints toward their monotonicity under LOCC operations. This work, along with our previous result for so-called symmetric and anti-symmetric X states, completes the pursuit of exact analytical expressions for the LAQC quantifier for 2-qubit X states.

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