Excitation and Entanglement Transfer Versus Spectral Gap

Michael J. Hartmann, Moritz E. Reuter, Martin B. Plenio

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Condensed matter systems have recently been proposed as quantum channels for short distance communication. One characteristic of these systems is whether they feature a spectral gap between their ground and excited states. In this paper we study the transfer of excitations and entanglement between two ancillas, which are weakly coupled to a one dimensional chain at different sites. We find that the transfer is almost perfect but slow for large spectral gaps and fast but rather inefficient for small gaps.
Original languageEnglish
Title of host publicationQuantum Computing
Subtitle of host publicationBack Action 2006
EditorsDebabrata Goswami
PublisherAIP Publishing
Number of pages13
ISBN (Print)9780735403628
Publication statusPublished - 15 Nov 2006
Event1st International Conference on Quantum Computing: Back Action - Kanpur, India
Duration: 6 Mar 200612 Mar 2006

Publication series

NameAIP Conference Proceedings
PublisherAIP Publishing
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference1st International Conference on Quantum Computing: Back Action


  • Quantum phase transitions
  • State transfer

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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