Optimal teleportation via thermal entangled states of a two-qubit Heisenberg Chain

Abstract

We study the optimal teleportation based on Bell measurements via the thermal states of a two-qubit Heisenberg XXX chain in the presence of Dzyaloshinsky-Moriya (DM) anisotropic antisymmetric interaction and obtain the optimal unitary transformation. The explicit expressions of the output state and the teleportation fidelity are presented and compared with those of the standard protocol. It is shown that in this protocol the teleportation fidelity is always larger and unit fidelity is achieved at zero temperature. The DM interaction can enhance the teleportation fidelity at finite temperatures, as opposed to the effect of the interaction in the standard protocol. Cases with other types of anisotropies are also discussed.

Accepted by EPL

References in corpus (2)

• Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field
• Quantum teleportation via a two-qubit Heisenberg XXZ chain-effects of anisotropy and magnetic field

Cited by in corpus (5)

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• Genuine Tripartite Entanglement in a Spin-Star Network at Thermal Equilibrium
• Thermal entanglement and quantum coherence of a single electron in a double quantum dot with Rashba Interaction
• Competition of Direct and Indirect Sources of Thermal Entanglement in a spin star network