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JETP Letters

, Volume 95, Issue 1, pp 25–28 | Cite as

Evolution of edge states in topological superfluids during the quantum phase transition

  • M. A. Silaev
  • G. E. Volovik
Condensed Matter

Abstract

The quantum phase transition between topological and nontopological insulators or between fully gapped superfluids/superconductors can occur without closing the gap. We consider the evolution of the Majorana edge states on the surface of topological superconductor during transition to the topologically trivial superconductor on example of non-interacting Hamiltonian describing spin-triplet superfluid 3He-B. In conventional situation when the gap is nullified at the transition, the spectrum of Majorana fermions shrinks and vanishes after the transition to the trivial state. If the topological transition occurs without the gap closing, the Majorana fermion spectrum disappears by escaping to ultraviolet, where the Green’s function approaches zero. This demonstrates the close connection between the topological transition without closing the gap and zeroes in the Green’s function. Similar connection takes place in interacting systems where zeroes may occur due to interaction.

Keywords

JETP Letter Edge State Topological Charge Quantum Phase Transition Topological Insulator 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  1. 1.Institute for Physics of MicrostructuresRussian Academy of SciencesNizhni NovgorodRussia
  2. 2.Low Temperature LaboratoryAalto University, School of Science and TechnologyAaltoFinland
  3. 3.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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