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Microscopic diagnosis of universal geometric responses in fractional quantum Hall liquids

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [5]
  1. Westlake Univ., Hangzhou (China); OSTI
  2. Zhejiang Univ., Hangzhou (China)
  3. California State University, Northridge (CSUN), CA (United States)
  4. Princeton Univ., NJ (United States)
  5. Westlake Univ., Hangzhou (China)

Topological quantum liquids contain internal degrees of freedom that are coupled to geometric response. Yet, an explicit and microscopic identification of the geometric response remains difficult. Here, taking notable fractional quantum Hall (FQH) states as typical examples, we systematically investigate a promising protocol—the Dehn-twist deformation on the torus geometry—to probe the geometric response of correlated topological states and establish the relation between such response and universal properties of pertinent states. Based on analytical derivations and numerical simulations, we find that the geometry-induced Berry phase encodes features for a broad class of FQH states at the Laughlin, hierarchy, Halperin and non-Abelian Moore-Read fillings. Our findings conclusively demonstrate that the adiabatic Dehn-twist deformation can faithfully capture rich geometric and topological information, including the Hall viscosity and topological spin of the pertinent FQH state and the chiral central charge of the underlying edge conformal field theory. Our approach provides a powerful way to reveal topological orders of generic FQH states and address previously open questions.

Research Organization:
Princeton University, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0002140
OSTI ID:
1850792
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 8 Vol. 103; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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