536 citations · 3.4k across the 38 of their papers we have counts for
21 papers · 1 filter
Floquet-driven crossover from density-assisted tunneling to enhanced pair tunneling
Nick Klemmer, Janek Fleper, Valentin Jonas +4
We investigate the experimental control of pair tunneling in a double-well potential using Floquet engineering. We demonstrate a crossover from a regime with density-assisted tunne…
Exciting the Higgs mode in a strongly-interacting Fermi gas by interaction modulation
Andreas Kell, Moritz Breyer, Daniel Eberz +1
We study the Higgs mode of a strongly-interacting Fermi gas in the crossover regime between a fermionic and bosonic superfluid. By periodically modulating the interaction strength…
Competing magnetic orders in a bilayer Hubbard model with ultracold atoms
Marcell Gall, Nicola Wurz, Jens Samland +2
Fermionic atoms in optical lattices have served as a compelling model system to study and emulate the physics of strongly-correlated matter. Driven by the advances of high-resoluti…
Machine-learning the phase diagram of a strongly-interacting Fermi gas
M. Link, K. Gao, A. Kell +4
We determine the phase diagram of strongly correlated fermions in the crossover from Bose-Einstein condensates of molecules (BEC) to Cooper pairs of fermions (BCS) utilizing an art…
Detecting the phase transition in a strongly-interacting Fermi gas by unsupervised machine learning
D. Eberz, M. Link, A. Kell +3
We study the critical temperature of the superfluid phase transition of strongly-interacting fermions in the crossover regime between a Bardeen-Cooper-Schrieffer (BCS) superconduct…
Radio-frequency driving of an attractive Fermi gas in a one-dimensional optical lattice
Johannes Kombe, Michael Köhl, Corinna Kollath +1
We investigate the response to radio-frequency driving of an ultracold gas of attractively interacting fermions in a one-dimensional optical lattice. We study the system dynamics b…
A compact and fast magnetic coil for the interaction manipulation of quantum gases with Feshbach resonances
A. Kell, M. Link, M. Breyer +3
Cold atom experiments commonly use broad magnetic Feshbach resonances to manipulate the interaction between atoms. In order to induce quantum dynamics by a change of the interactio…
Decay and revival of a transient trapped Fermi condensate
Timothy Harrison, Martin Link, Alexandra Behrle +6
We study experimentally and theoretically the response of a two-component Fermi condensate in the strongly-interacting regime to a quench of the interaction strength. The quench is…
Coherent Manipulation of Spin Correlations in the Hubbard Model
N. Wurz, C. F. Chan, M. Gall +6
We coherently manipulate spin correlations in a two-component atomic Fermi gas loaded into an optical lattice using spatially and time-resolved Ramsey spectroscopy combined with hi…
Measuring entropy and mutual information in the two-dimensional Hubbard model
E. Cocchi, L. A. Miller, J. H. Drewes +4
We measure pressure and entropy of ultracold fermionic atoms in an optical lattice for a range of interaction strengths, temperatures and fillings. Our measurements demonstrate tha…
Antiferromagnetic correlations in two-dimensional fermionic Mott-insulating and metallic phases
J. H. Drewes, L. A. Miller, E. Cocchi +4
Near zero temperature, quantum magnetism can non-trivially arise from short-range interactions, but the occurrence of magnetic order depends crucially on the interplay of interacti…
Thermodynamics vs. local density fluctuations in the metal/Mott-insulator crossover
J. H. Drewes, E. Cocchi, L. A. Miller +4
The crossover between a metal and a Mott insulator leads to a localization of fermions from delocalized Bloch states to localized states. We experimentally study this crossover usi…
Equation of state of the two-dimensional Hubbard model
Eugenio Cocchi, Luke A. Miller, Jan H. Drewes +4
Understanding the phases of strongly correlated quantum matter is challenging because they arise from the subtle interplay between kinetic energy, interactions, and dimensionality.…
Relaxation dynamics of a Fermi gas in an optical superlattice
D. Pertot, A. Sheikhan, E. Cocchi +5
This paper comprises an experimental and theoretical investigation of the time evolution of a Fermi gas following fast and slow quenches of a one-dimensional optical double-well su…
Universal spin dynamics in two-dimensional Fermi gases
Marco Koschorreck, Daniel Pertot, Enrico Vogt +1
Harnessing spins as carriers for information has emerged as an elegant extension to the transport of electrical charges. The coherence of such spin transport in spintronic circuits…
Collective modes of a two-dimensional spin-1/2 Fermi gas in a harmonic trap
Stefan K. Baur, Enrico Vogt, Michael Köhl +1
We derive analytical expressions for the frequency and damping of the lowest collective modes of a two-dimensional Fermi gas using kinetic theory. For strong coupling, we furthermo…
A two-dimensional Fermi liquid with attractive interactions
B. Fröhlich, M. Feld, E. Vogt +4
We realize and study an attractively interacting two-dimensional Fermi liquid. Using momentum resolved photoemission spectroscopy, we measure the self-energy, determine the contact…
Attractive and repulsive Fermi polarons in two dimensions
Marco Koschorreck, Daniel Pertot, Enrico Vogt +3
The dynamics of a single impurity in an environment is a fundamental problem in many-body physics. In the solid state, a well-known case is an impurity coupled to a bosonic bath, f…
Observation of a pairing pseudogap in a two-dimensional Fermi gas
Michael Feld, Bernd Fröhlich, Enrico Vogt +2
Pairing of fermions is ubiquitous in nature and it is responsible for a large variety of fascinating phenomena like superconductivity, superfluidity of He, the anomalous rotati…
Scale invariance and viscosity of a two-dimensional Fermi gas
Enrico Vogt, Michael Feld, Bernd Fröhlich +3
We investigate the collective excitations of a harmonically trapped two-dimensional Fermi gas from the collisionless (zero sound) to the hydrodynamic (first sound) regime. The brea…
A trapped single ion inside a Bose-Einstein condensate
Christoph Zipkes, Stefan Palzer, Carlo Sias +1
Improved control of the motional and internal quantum states of ultracold neutral atoms and ions has opened intriguing possibilities for quantum simulation and quantum computation.…