Multipartite entangled magnon states as quantum communication channels

E. Sriram Prasath, Sarath Muralidharan, Chiranjib Mitra, Prasanta K. Panigrahi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We investigate the entanglement properties of the two magnon states and explicate conditions under which, the two magnon state becomes useful for several quantum communication protocols. We systematically study the temporal behaviour of concurrence to find out the effect of exchange interaction on entanglement. The two magnon state, which is potentially realizable in quantum dots using Heisenberg exchange interaction, is found to be suitable for carrying out deterministic teleportation of an arbitrary two qubit composite system. Further, conditions for which the channel capacity reaches "Holevo bound", allowing four classical bits to be transmitted through two qubits are derived. Later, an unconventional protocol is given to demonstrate that this state can be used for sharing of a two qubit entangled state among two parties. © 2011 Springer Science+Business Media, LLC.

Original languageEnglish
Pages (from-to)397-410
Number of pages14
JournalQuantum Information Processing
Volume11
Issue number2
DOIs
Publication statusPublished - Apr 2012

Keywords

  • Entanglement
  • Magnon state
  • State sharing
  • Superdensecoding
  • Teleportation

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