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  Luttinger liquid with complex forward scattering: Robustness and Berry phase

Dora, B., & Moessner, R. (2016). Luttinger liquid with complex forward scattering: Robustness and Berry phase. Physical Review B, 93(7): 075127. doi:10.1103/PhysRevB.93.075127.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-09BA-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-0FD6-D
Genre: Journal Article

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 Creators:
Dora, Balazs1, Author
Moessner, Roderich2, Author              
Affiliations:
1external, ou_persistent22              
2Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: Strongly correlated electrons
 Abstract: Luttinger liquids (LLs) are one-dimensional systems with well-understood instabilities due to Umklapp or backscattering. We study a generalization of the Luttinger model, which incorporates a time reversal symmetry breaking interaction producing a complex forward scattering amplitude (g(2) process). The resulting low energy state is still a LL and belongs to the family of interacting Schulz-Shastry models. Remarkably, it becomes increasingly robust against additional perturbations-for purely imaginary g(2), both Umklapp and local backscattering are always irrelevant. Changing the phase of the interaction generates a nontrivial Berry phase, with a universal geometric phase difference between ground and a one boson excited state depending only on the LL parameter.

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 Dates: 2016-02-122016-02-15
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.93.075127
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 93 (7) Sequence Number: 075127 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008