Dynamics of ultracold quantum gases in the dissipative Fermi–Hubbard model
- K. Sponselee, L. Freystatzky, C. Becker
- PhysicsQuantum Science and Technology
- 30 May 2018
We employ metastable ultracold 173Yb atoms to study dynamics in the 1D dissipative Fermi–Hubbard model experimentally and theoretically, and observe a complete inhibition of two-body losses after…
Engineering Ising-XY spin-models in a triangular lattice using tunable artificial gauge fields
- J. Struck, M. Weinberg, L. Mathey
- Physics
- 19 April 2013
A quantum gas trapped in an optical lattice of triangular symmetry can now be driven from a paramagnetic to an antiferromagnetic state by a tunable artificial magnetic field.
Microscopic theory for the light-induced anomalous Hall effect in graphene
- S. A. Sato, J. McIver, Á. Rubio
- PhysicsPhysical review B
- 11 May 2019
We employ a quantum Liouville equation with relaxation to model the recently observed anomalous Hall effect in graphene irradiated by an ultrafast pulse of circularly polarized light. In the…
Critical velocity in the BEC-BCS crossover.
- W. Weimer, K. Morgener, H. Moritz
- PhysicsPhysical Review Letters
- 3 June 2014
In the strongly correlated regime the measurements of v_{c} provide a testing ground for theoretical approaches and find very good agreement in the Bose-Einstein condensation regime, validating the approach.
Decay of a superfluid current of ultracold atoms in a toroidal trap
- Amy C. Mathey, C. Clark, L. Mathey
- Physics
- 6 June 2012
Using a numerical implementation of the truncated Wigner approximation, we simulate the experiment reported by Ramanathan et al. in Phys. Rev. Lett. 106, 130401 (2011), in which a Bose-Einstein…
Probing superfluidity of Bose-Einstein condensates via laser stirring
We investigate the superfluid behavior of a Bose-Einstein condensate of $^{6}\mathrm{Li}$ molecules. In the experiment by Weimer et al. [Phys. Rev. Lett. 114, 095301 (2015)] a condensate is stirred…
Dynamical phase transition in the open Dicke model
- J. Klinder, H. Keßler, M. Wolke, L. Mathey, A. Hemmerich
- PhysicsProceedings of the National Academy of Sciences
- 5 September 2014
In well-controlled sweeps across the Hepp–Lieb–Dicke phase transition, hysteretic dynamics showing power-law scaling with respect to the transition time suggests an interpretation in terms of a Kibble–Zurek mechanism, and indicates the possibility of universal behavior in the presence of dissipation.
Observation of a dynamical topological phase transition
- Nick Flaschner, D. Vogel, C. Weitenberg
- Physics
- 19 August 2016
Phase transitions are a fundamental concept in science describing diverse phenomena ranging from, e.g., the freezing of water to Bose-Einstein condensation. While the concept is well-established in…
Probing optically silent superfluid stripes in cuprates
- S. Rajasekaran, J. Okamoto, A. Cavalleri
- PhysicsScience
- 17 May 2017
The findings suggest the formation of a peculiar spatially modulated superconducting state called the pair-density wave, in which nonlinear mixing of optically silent tunneling modes drives large dipole-carrying supercurrents.
Luttinger liquid of polarons in one-dimensional boson-fermion mixtures.
- L. Mathey, D.-W. Wang, W. Hofstetter, M. Lukin, E. Demler
- PhysicsPhysical Review Letters
- 23 January 2004
This work uses the bosonization approach to investigate quantum phases of boson-fermion mixtures (BFM) of atoms confined to one dimension by an anisotropic optical lattice and obtains the rich phase diagram of a BFM with two species of fermions.
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