Using quantum typicality to compute the thermodynamics of the frustrated spin compound SrCu2(BO3)2

ORAL

Abstract

The concept of quantum typicality presents a novel route to computing finite temperature
properties of quantum many-body systems. We demonstrate, how to use the Lanczos method
in conjunction with quantum typicality to extract thermodynamic quantities at arbitrary
temperatures without a full diagonalization of the Hamiltonian. This technique is
applied to compute the thermodynamics of the frustrated spin compound SrCu2(BO3)2, where
recently a pressure-induced quantum phase transition has been observed. Our results
are compared to Quantum Monte Carlo and iPEPS simulations.

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Presenters

  • Alexander Wietek

    Flatiron Institute, Simons Foundation

Authors

  • Alexander Wietek

    Flatiron Institute, Simons Foundation

  • Andreas Honecker

    Universite de Cergy-Pontoise, Laboratoire de Physique Théorique et Modélisation, Cergy-Pontoise University, Laboratoire de Physique Théorique et Modélisation, Université de Cergy-Pontoise

  • Philippe Corboz

    University of Amsterdam, Institute for Theoretical Physics, University of Amsterdam, Institute for Theoretical Physics and Delta Institute for Theoretical Physics, Universiteit van Amsterdam

  • Stefan Wessel

    Institut für Theoretische Festkörperphysik, RWTH Aachen University, RWTH Aachen University, Institute for Theoretical Solid State Physics, RWTH Aachen University

  • Frederic Mila

    EPFL Lausanne, Institute of Theoretical Physics, Ecole Polytechnique Fédérale Lausanne (EPFL), Institute of Physics, École Polytechnique Fédérale de Lausanne, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL)

  • Bruce Normand

    Paul Scherrer Institute, Switzerland, Paul Scherrer Institute, Neutrons and Muons Research Division, Paul Scherrer Institute, Paul Scherer Institute, Vilingen, Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland