SwePub
Sök i SwePub databas

  Extended search

Träfflista för sökning "WFRF:(Verresen Ruben) "

Search: WFRF:(Verresen Ruben)

  • Result 1-2 of 2
Sort/group result
   
EnumerationReferenceCoverFind
1.
  • Borla, Umberto, et al. (author)
  • Confined Phases of One-Dimensional Spinless Fermions Coupled to Z(2) Gauge Theory
  • 2020
  • In: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 124:12
  • Journal article (peer-reviewed)abstract
    • We investigate a quantum many-body lattice system of one-dimensional spinless fermions interacting with a dynamical Z(2) gauge field. The gauge field mediates long-range attraction between fermions resulting in their confinement into bosonic dimers. At strong coupling we develop an exactly solvable effective theory of such dimers with emergent constraints. Even at generic coupling and fermion density, the model can be rewritten as a local spin chain. Using the density matrix renormalization group the system is shown to form a Luttinger liquid, indicating the emergence of fractionalized excitations despite the confinement of lattice fermions. In a finite chain we observe the doubling of the period of Friedel oscillations which paves the way towards experimental detection of confinement in this system. We discuss the possibility of a Mott phase at the commensurate filling 2/3.
  •  
2.
  • Borla, Umberto, et al. (author)
  • Gauging the Kitaev chain
  • 2021
  • In: SciPost Physics. - : SciPost Foundation. - 2542-4653. ; 10:6
  • Journal article (peer-reviewed)abstract
    • We gauge the fermion parity symmetry of the Kitaev chain. While the bulk of the model becomes an Ising chain of gauge-invariant spins in a tilted field, near the boundaries the global fermion parity symmetry survives gauging, leading to local gauge-invariant Majorana operators. In the absence of vortices, the Higgs phase exhibits fermionic symmetry-protected topological (SPT) order distinct from the Kitaev chain. Moreover, the deconfined phase can be stable even in the presence of vortices. We also undertake a comprehensive study of a gently gauged model which interpolates between the ordinary and gauged Kitaev chains. This showcases rich quantum criticality and illuminates the topological nature of the Higgs phase. Even in the absence of superconducting terms, gauging leads to an SPT phase which is intrinsically gapless due to an emergent anomaly.
  •  
Skapa referenser, mejla, bekava och länka
  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Borla, Umberto (2)
Moroz, Sergej (2)
Verresen, Ruben (2)
Grusdt, Fabian (1)
Shah, Jeet (1)
University
Karlstad University (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)

Year

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view