Spin chains for two-qubit teleportation

Salvatore Lorenzo, Tony J. G. Apollaro, Guilherme M. A. Almeida, Simone Paganelli, Alessandro Ferraro

Risultato della ricerca: Articlepeer review

8 Citazioni (Scopus)

Abstract

Generating high-quality multiparticle entanglement between communicating parties is the primary resource in quantum teleportation protocols. To this aim, we show that the natural dynamics of a single spin chain is able to sustain the generation of two pairs of Bell states--possibly shared between a sender and a distant receiver-which can in turn enable two-qubit teleportation. In particular, we address a spin-12 chain with XX interactions, connecting two pairs of spins located at its boundaries, playing the roles of sender and receiver. In the regime where both end pairs are weakly coupled to the spin chain, it is possible to generate at predefinite times a state that has vanishing infidelity with the product state of two Bell pairs, thereby providing nearly unit fidelity of teleportation. We also derive an effective Hamiltonian via a second-order perturbation approach that faithfully reproduces the dynamics of the full system.
Lingua originaleEnglish
pagine (da-a)052308-
Numero di pagine8
RivistaPhysical Review A
Volume100
Stato di pubblicazionePublished - 2019

All Science Journal Classification (ASJC) codes

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