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First-Order Topological Quantum Phase Transition in a Strongly Correlated Ladder
S. Barbarino, G. Sangiovanni, J. C. Budich
We report on the discovery of a quantum tri-critical point (QTP) separating a line of first-order topological quantum phase transitions from a continuous transition regime in a str…
Quench Dynamics and Hall Response of Interacting Chern Insulators
Michael Schüler, Jan Carl Budich, Philipp Werner
We study the coherent non-equilibrium dynamics of interacting two-dimensional systems after a quench from a trivial to a topological Chern insulator phase. While the many-body wave…
Knotted Non-Hermitian Metals
Johan Carlström, Marcus Stålhammar, Jan Carl Budich +1
We report on the occurrence of knotted metallic band structures as stable topological phases in non-Hermitian (NH) systems. These knotted NH metals are characterized by open Fermi…
Symmetry-protected nodal phases in non-Hermitian systems
Jan Carl Budich, Johan Carlström, Flore K. Kunst +1
Non-Hermitian (NH) Hamiltonians have become an important asset for the effective description of various physical systems that are subject to dissipation. Motivated by recent experi…
Measuring a Dynamical Topological Order Parameter in Quantum Walks
Xiao-Ye Xu, Qin-Qin Wang, Markus Heyl +9
Quantum processes of inherent dynamical nature, such as quantum walks (QWs), defy a description in terms of an equilibrium statistical physics ensemble. Up to now, it has remained…
Generalized Transfer Matrix States from Artificial Neural Networks
Lorenzo Pastori, Raphael Kaubruegger, Jan Carl Budich
Identifying variational wave functions that efficiently parametrize the physically relevant states in the exponentially large Hilbert space is one of the key tasks towards solving…