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Field-tunable Berezinskii-Kosterlitz-Thouless correlations in a Heisenberg magnet
D. Opherden, M. S. J. Tepaske, F. Bärtl +10
We report the manifestation of field-induced Berezinskii-Kosterlitz-Thouless (BKT) correlations in the weakly coupled spin-1/2 Heisenberg layers of the molecular-based bulk materia…
Quantum many-body Jarzynski equality and dissipative noise on a digital quantum computer
Dominik Hahn, Maxime Dupont, Markus Schmitt +2
The quantum Jarzynski equality and the Crooks relation are fundamental laws connecting equilibrium processes with nonequilibrium fluctuations. They are promising tools to benchmark…
Quantum Monte Carlo at the Graphene Quantum Hall Edge
Zhenjiu Wang, David J. Luitz, Inti Sodemann Villadiego
We study a continuum model of the interface of graphene and vacuum in the quantum hall regime via sign-problem-free quantum Monte Carlo, allowing us to investigate the interplay of…
Optimal compression of quantum many-body time evolution operators into brickwall circuits
Maurits S. J. Tepaske, Dominik Hahn, David J. Luitz
Near term quantum computers suffer from a degree of decoherence which is prohibitive for high fidelity simulations with deep circuits. An economical use of circuit depth is therefo…
Symmetry protected exceptional points of interacting fermions
Robin Schäfer, Jan C. Budich, David J. Luitz
Non-hermitian quantum systems can exhibit spectral degeneracies known as exceptional points, where two or more eigenvectors coalesce, leading to a non-diagonalizable Jordan block.…
Sub-diffusive Thouless time scaling in the Anderson model on random regular graphs
Luis Colmenarez, David J. Luitz, Ivan M. Khaymovich +1
The scaling of the Thouless time with system size is of fundamental importance to characterize dynamical properties in quantum systems. In this work, we study the scaling of the Th…