Particle on a ring coupled with a dirty metal

Victor Kagalovsky, Baruch Horovitz

Research output: Contribution to journalConference articlepeer-review


A charged particle of mass M on a ring of radius R is coupled to a dirty metal environment.With Monte-Carlo methods we evaluate the curvature of the Aharonov-Bohm oscillations and find a quantum phase transition at a critical Rc. At low temperatures T the curvature has the form 1/M*R 2 with an R independent M* > M in the R > Rc phase, while M* rapidly approaches M in the R < Rc phase. The approach to T = 0 defines diverging length scales ∼ T with η ≈ 1 and η ≈ 1/ 4 in the large and small R phases, respectively.

Original languageEnglish
Pages (from-to)848-852
Number of pages5
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number3
StatePublished - 1 Dec 2008
Event12th International Conference on Transport in Interacting Disordered Systems, TIDS 12 - Marburg, Germany
Duration: 6 Aug 200710 Aug 2007

ASJC Scopus subject areas

  • Condensed Matter Physics


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