Observation of geometric phases for mixed states using NMR interferometry

J F Du, P Zou, M J Shi, L C Kwek, J W Pan, C H Oh, A Ekert, D K L Oi, M Ericsson

Research output: Contribution to journalArticle

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Abstract

Examples of geometric phases abound in many areas of physics. They offer both fundamental insights into many physical phenomena and lead to interesting practical implementations. One of them, as indicated recently, might be an inherently fault-tolerant quantum computation. This, however, requires one to deal with geometric phases in the presence of noise and interactions between different physical subsystems. Despite the wealth of literature on the subject of geometric phases very little is known about this very important case. Here we report the first experimental study of geometric phases for mixed quantum states. We show how different they are from the well-understood, noiseless, pure-state case.

Original languageEnglish
Article number100403
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Volume91
Issue number10
DOIs
Publication statusPublished - 5 Sep 2003

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quantum computation
interferometry
nuclear magnetic resonance
physics
interactions

Keywords

  • nuclear magnetic resonance
  • quantum systems
  • interferometry

Cite this

Du, J. F., Zou, P., Shi, M. J., Kwek, L. C., Pan, J. W., Oh, C. H., ... Ericsson, M. (2003). Observation of geometric phases for mixed states using NMR interferometry. Physical Review Letters, 91(10), -. [100403]. https://doi.org/10.1103/PhysRevLett.91.100403
Du, J F ; Zou, P ; Shi, M J ; Kwek, L C ; Pan, J W ; Oh, C H ; Ekert, A ; Oi, D K L ; Ericsson, M . / Observation of geometric phases for mixed states using NMR interferometry. In: Physical Review Letters. 2003 ; Vol. 91, No. 10. pp. -.
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Du, JF, Zou, P, Shi, MJ, Kwek, LC, Pan, JW, Oh, CH, Ekert, A, Oi, DKL & Ericsson, M 2003, 'Observation of geometric phases for mixed states using NMR interferometry', Physical Review Letters, vol. 91, no. 10, 100403, pp. -. https://doi.org/10.1103/PhysRevLett.91.100403

Observation of geometric phases for mixed states using NMR interferometry. / Du, J F ; Zou, P ; Shi, M J ; Kwek, L C ; Pan, J W ; Oh, C H ; Ekert, A ; Oi, D K L ; Ericsson, M .

In: Physical Review Letters, Vol. 91, No. 10, 100403, 05.09.2003, p. -.

Research output: Contribution to journalArticle

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