315 citations · 1.6k across the 49 of their papers we have counts for
15 papers · 1 filter
Few is different: deciphering many-body dynamics in mesoscopic quantum gases
Juergen Berges, Sandra Brandstetter, Jasmine Brewer +27
Emergent macroscopic descriptions of matter, such as hydrodynamics, are central to our description of complex physical systems across a wide spectrum of energy scales. The conventi…
Hamiltonian Learning in Quantum Field Theories
Robert Ott, Torsten V. Zache, Maximilian Prüfer +5
We discuss Hamiltonian learning in quantum field theories as a protocol for systematically extracting the operator content and coupling constants of effective field theory Hamilton…
Equal-time approach to real-time dynamics of quantum fields
Robert Ott, Torsten V. Zache, Jürgen Berges
We employ the equal-time formulation of quantum field theory to derive effective kinetic theories, first for a weakly coupled non-relativistic Bose gas, and then for a strongly cor…
Achieving the quantum field theory limit in far-from-equilibrium quantum link models
Jad C. Halimeh, Maarten Van Damme, Torsten V. Zache +2
Realizations of gauge theories in setups of quantum synthetic matter open up the possibility of probing salient exotic phenomena in condensed matter and high-energy physics, along…
Entanglement Spectroscopy and probing the Li-Haldane Conjecture in Topological Quantum Matter
Torsten V. Zache, Christian Kokail, Bhuvanesh Sundar +1
Topological phases are characterized by their entanglement properties, which is manifest in a direct relation between entanglement spectra and edge states discovered by Li and Hald…
Dimensional crossover for universal scaling far from equilibrium
Lasse Gresista, Torsten V. Zache, Jürgen Berges
We perform a dynamical finite-size scaling analysis of a nonequilibrium Bose gas which is confined in the transverse plane. Varying the transverse size, we establish a dimensional…
Cold atoms meet lattice gauge theory
Monika Aidelsburger, Luca Barbiero, Alejandro Bermudez +19
The central idea of this review is to consider quantum field theory models relevant for particle physics and replace the fermionic matter in these models by a bosonic one. This is…
Scalable cold-atom quantum simulator for two-dimensional QED
Robert Ott, Torsten V. Zache, Fred Jendrzejewski +1
We propose a scalable analog quantum simulator for quantum electrodynamics (QED) in two spatial dimensions. The setup for the U(1) lattice gauge field theory employs inter-species…
Observation of gauge invariance in a 71-site Bose-Hubbard quantum simulator
Bing Yang, Hui Sun, Robert Ott +6
The modern description of elementary particles, as formulated in the Standard Model of particle physics, is built on gauge theories. Gauge theories implement fundamental laws of ph…
Realizing a scalable building block of a U(1) gauge theory with cold atomic mixtures
Alexander Mil, Torsten V. Zache, Apoorva Hegde +6
In the fundamental laws of physics, gauge fields mediate the interaction between charged particles. An example is quantum electrodynamics -- the theory of electrons interacting wit…
Experimental extraction of the quantum effective action for a non-equilibrium many-body system
Maximilian Prüfer, Torsten V. Zache, Philipp Kunkel +5
Far-from-equilibrium situations are ubiquitous in nature. They are responsible for a wealth of phenomena, which are not simple extensions of near-equilibrium properties, ranging fr…
Extracting the field theory description of a quantum many-body system from experimental data
Torsten V. Zache, Thomas Schweigler, Sebastian Erne +2
Quantum field theory is a powerful tool to describe the relevant physics governing complex quantum many-body systems. Here we develop a general pathway to extract the irreducible b…
Non-cancellation of the parity anomaly in the strong-field regime of QED
Robert Ott, Torsten V. Zache, Niklas Mueller +1
Quantum fluctuations lead to an anomalous violation of parity symmetry in quantum electrodynamics for an even number of spatial dimensions. While the leading parity-odd electric cu…
Quantum simulation of lattice gauge theories using Wilson fermions
T. V. Zache, F. Hebenstreit, F. Jendrzejewski +3
Quantum simulators have the exciting prospect of giving access to real-time dynamics of lattice gauge theories, in particular in regimes that are difficult to compute on classical…
Inflationary preheating dynamics with ultracold atoms
Torsten V. Zache, Valentin Kasper, Jürgen Berges
We discuss the amplification of loop corrections in quantum many-body systems through dynamical instabilities. As an example, we investigate both analytically and numerically a two…