Novel Order Parameter to Characterize Valence-Bond-Solid States

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Author(s)

Abstract

We propose an order parameter to characterize valence-bond-solid (VBS) states in quantum spin systems, given by the ground-state expectation value of a unitary operator appearing in the Lieb-Schultz-Mattis argument. We show that the order parameter changes the sign according to the configuration of the valence bonds. This allows us to determine the phase transition point in between different VBS states accurately. We demonstrate this theory in the bond-alternating Heisenberg chain and in the frustrated spin ladder.

Journal

  • Progress of Theoretical Physics

    Progress of Theoretical Physics (145), 217-220, 2002-06-28

    Progress of Theoretical Physics

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Codes

  • NII Article ID (NAID)
    110001209250
  • NII NACSIS-CAT ID (NCID)
    AA00791466
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    03759687
  • NDL Article ID
    6206279
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A468
  • Data Source
    CJP  NDL  NII-ELS  NDL-Digital 
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