Quantum criticality in Ising chains with random hyperuniform couplings

ORAL

Abstract

In critical Ising chains, independent random disorder localises almost all excitations, and drives the system to an infinite randomness critical point. However, correlations in the disorder can change the universality, and even make the disorder irrelevant.

We show this in the critical hyperuniform random Ising chain, where increasing hyperuniformity yields a line of Griffiths-free infinite-randomness critical points with continuously varying exponents, this line terminates at the Ising class “critical Ising insulator”.

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Presenters

  • Philip Crowley

    • Boston University

Authors

  • Philip Crowley

    • Boston University

  • Christopher Laumann

    • Physics, Boston University
    • Boston University

  • Sarang Gopalakrishnan

    • CUNY College of Staten Island, and CUNY Graduate Center
    • Physics, CUNY College of Staten Island
    • Physics and Astronomy, CSI and GC, CUNY
    • CUNY College of Staten Island; The Graduate Center, CUNY
    • Department of Physics and Astronomy, CUNY College of Staten Island
    • Physics, CUNY
    • College of Staten Island
    • City University of New York
    • Physics, The Graduate Center, CUNY