Routing quantum information in spin chains

Salvatore Lorenzo, Tony J. G. Apollaro, Salvatore Lorenzo, Simone Paganelli, Francesco Plastina, Gian Luca Giorgi

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

Two different models are presented that allow for efficiently performing routing of a quantum state. Both cases involve an XX spin chain working as a data bus and additional spins that play the role of sender and receivers, one of which is selected to be the target of the quantum state transmission protocol via a coherent quantum coupling mechanism making use of local and/or global magnetic fields. Quantum routing is achieved in the first of the models considered by weakly coupling the sender and the receiver to the data bus. On the other hand, in the second model, local magnetic fields acting on additional spins located between the sender and receiver and the data bus allow us to perform high-fidelity routing.
Original languageEnglish
Number of pages8
JournalPHYSICAL REVIEW A
Volume87
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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