"Allowed and forbidden bipartite correlations from thermal states" by Tamal Guha, Mir Alimuddin et al.
 

Allowed and forbidden bipartite correlations from thermal states

Article Type

Research Article

Publication Title

Physical Review E

Abstract

The strong connection between correlations and quantum thermodynamics raises a natural question about the preparation of correlated quantum states from two copies of a thermal qubit. In this work we study the specific forms of allowed and forbidden bipartite correlations. As a consequence, we extend the result to separable but not absolutely separable class of product states. Preparation of a general form of entanglement from arbitrary thermal qubits is studied and, as an application, we propose a strategy to establish desired entanglement between two distant parties. The threshold temperature to produce entanglement from two copies of a thermal qubit has also been discussed from the resource theoretic perspective, which ensures that the bound on the temperature can be superseded with the help of a resource state. A dimension dependent upper bound on the temperature is derived, below which two copies of any d-dimensional thermal state can be entangled in 2×d dimensions.

DOI

10.1103/PhysRevE.100.012147

Publication Date

7-30-2019

Comments

Open Access, Green

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