32 citations · 100 across the 11 of their papers we have counts for
11 papers
Nonlinear light cone spreading of correlations in a triangular quantum magnet: a hard quantum simulation target
A. Scheie, J. Willsher, E. A. Ghioldi +6
Dynamical correlations of quantum many-body systems are typically analyzed in the momentum space and frequency basis. However, quantum simulators operate more naturally in real spa…
Persistence of the Berezinskii-Kosterlitz-Thouless transition with long-range couplings
Luis Walther, Josef Willsher, Johannes Knolle
The Berezinskii-Kosterlitz-Thouless (BKT) transition is an archetypal example of a topological phase transition, which is driven by the proliferation of vortices. In this Letter, w…
Dynamics and stability of U(1) spin liquids beyond mean-field theory: Triangular-lattice - Heisenberg model
Josef Willsher, Johannes Knolle
Quantum spin liquids (QSLs) are long-range entangled phases of frustrated magnets exhibiting fractionalised spin excitations. In two dimensions, there is limited analytical underst…
Stability of algebraic spin liquids coupled to quantum phonons
Francesco Ferrari, Josef Willsher, Urban F. P. Seifert +2
Algebraic spin liquids are quantum disordered phases of insulating magnets which exhibit fractionalized gapless excitations and power-law correlations. Quantum spin liquids in this…
Spin-Peierls instability of deconfined quantum critical points
David Hofmeier, Josef Willsher, Urban F. P. Seifert +1
Deconfined quantum critical points (DQCPs) are putative phase transitions beyond the Landau paradigm with emergent fractionalized degrees of freedom. The original example of a DQCP…
Breakdown of Chiral Edge Modes in Topological Magnon Insulators
Jonas Habel, Alexander Mook, Josef Willsher +1
Topological magnon insulators (TMI) are ordered magnets supporting chiral edge magnon excitations. These edge states are envisioned to serve as topologically protected information…
Spin-Peierls instability of the U(1) Dirac spin liquid
Urban F. P. Seifert, Josef Willsher, Markus Drescher +2
A complicating factor in the realization and observation of quantum spin liquids in materials is the ubiquitous presence of other degrees of freedom, in particular lattice distorti…
Magnetic excitations, phase diagram and order-by-disorder in the extended triangular-lattice Hubbard model
Josef Willsher, Hui-Ke Jin, Johannes Knolle
The dynamical structure factor is an important observable of quantum magnets but due to numerical and theoretical limitations, it remains a challenge to make predictions for Hubbar…
Measurement-induced phase transition in a classical, chaotic many-body system
Josef Willsher, Shu-Wei Liu, Roderich Moessner +1
Local measurements in quantum systems are projective operations which act to counteract the spread of quantum entanglement. Recent work has shown that local, random measurements ap…
The one-dimensional Long-Range Falikov-Kimball Model: Thermal Phase Transition and Disorder-Free Localisation
Thomas Hodson, Josef Willsher, Johannes Knolle
Disorder or interactions can turn metals into insulators. One of the simplest settings to study this physics is given by the Falikov-Kimball model, which describes itinerant fermio…
Butterfly Effect and Spatial Structure of Information Spreading in a Chaotic Cellular Automaton
Shuwei Liu, J. Willsher, T. Bilitewski +5
Inspired by recent developments in the study of chaos in many-body systems, we construct a measure of local information spreading for a stochastic Cellular Automaton in the form of…