Feedback control of entanglement in a linear quantum network: A case study

Naoki Yamamoto, Hendra I. Nurdin, Matthew R. Jamest, Ian R. Petersen

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

Abstract

In this paper, we consider a linear quantum network composed of two distantly separated cavities that are connected via a one-way optical field. When one of the cavity is damped and the other is undamped, the overall cavity state obtains a large amount of entanglement in its quadratures. This entanglement however immediately decays and vanishes in a finite time. That is, entanglement sudden-death occurs. We show that the proportional measurement feedback method proposed by Wiseman can avoid this entanglement suddendeath, and further, enhance the entanglement. It is also shown that the entangled state under feedback control is robust against signal loss in a realistic detector, indicating the reliability of the proposed proportional feedback method in practical situations.

Original languageEnglish
Title of host publicationProceedings of the 47th IEEE Conference on Decision and Control, CDC 2008
Pages4528-4533
Number of pages6
DOIs
Publication statusPublished - 2008 Dec 1
Event47th IEEE Conference on Decision and Control, CDC 2008 - Cancun, Mexico
Duration: 2008 Dec 92008 Dec 11

Publication series

NameProceedings of the IEEE Conference on Decision and Control
ISSN (Print)0191-2216

Other

Other47th IEEE Conference on Decision and Control, CDC 2008
CountryMexico
CityCancun
Period08/12/908/12/11

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Modelling and Simulation
  • Control and Optimization

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  • Cite this

    Yamamoto, N., Nurdin, H. I., Jamest, M. R., & Petersen, I. R. (2008). Feedback control of entanglement in a linear quantum network: A case study. In Proceedings of the 47th IEEE Conference on Decision and Control, CDC 2008 (pp. 4528-4533). [4739032] (Proceedings of the IEEE Conference on Decision and Control). https://doi.org/10.1109/CDC.2008.4739032