Experimental realization of the topological Haldane model with ultracold fermions
- G. Jotzu, M. Messer, T. Esslinger
- PhysicsNature
- 30 June 2014
The experimental realization of the Haldane model and the characterization of its topological band structure are reported, using ultracold fermionic atoms in a periodically modulated optical honeycomb lattice and a direct extension to realize spin-dependent topological Hamiltonians is proposed.
Creating, moving and merging Dirac points with a Fermi gas in a tunable honeycomb lattice
- L. Tarruell, D. Greif, T. Uehlinger, G. Jotzu, T. Esslinger
- PhysicsNature
- 21 November 2011
The creation of Dirac points with adjustable properties in a tunable honeycomb optical lattice is reported and the unique tunability of the lattice potential is exploited to adjust the effective mass of the Dirac fermions by breaking inversion symmetry.
Light-induced anomalous Hall effect in graphene
- J. McIver, B. Schulte, A. Cavalleri
- PhysicsNature Physics
- 8 November 2018
The observation of a light-induced anomalous Hall effect in monolayer graphene driven by a femtosecond pulse of circularly polarized light reveals multiple features that reflect a Floquet-engineered topological band structure similar to the band structure originally proposed by Haldane 10 .
Short-Range Quantum Magnetism of Ultracold Fermions in an Optical Lattice
- D. Greif, T. Uehlinger, G. Jotzu, L. Tarruell, T. Esslinger
- PhysicsScience
- 11 December 2012
The observation of nearest-neighbor magnetic correlations emerging in the many-body state of a thermalized Fermi gas in an optical lattice facilitates addressing open problems in quantum magnetism through the use of quantum simulation.
Pressure tuning of light-induced superconductivity in K3C60
- A. Cantaluppi, M. Buzzi, A. Cavalleri
- PhysicsNature Physics
- 16 May 2017
This observation excludes alternative interpretations based on a high-mobility metallic phase and suggests that transient, incipient superconductivity occurs far above the 150 K hypothesized previously, and rather extends all the way to room temperature.
Artificial graphene with tunable interactions.
- T. Uehlinger, G. Jotzu, T. Esslinger
- PhysicsPhysical Review Letters
- 20 August 2013
A quantitative comparison between measurements and theory is presented, making use of a novel numerical method to obtain Wannier functions for complex lattice structures and investigates the equilibration of the double occupancy as a function of lattice loading time.
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…
Evidence for metastable photo-induced superconductivity in K3C60
- M. Budden, T. Gebert, A. Cavalleri
- PhysicsNature Physics
- 28 February 2020
Excitation of high-Tc cuprates and certain organic superconductors with intense far-infrared optical pulses has been shown to create non-equilibrium states with optical properties that are consistent…
Controlling the Floquet state population and observing micromotion in a periodically driven two-body quantum system
- R. Desbuquois, M. Messer, F. Gorg, Kilian Sandholzer, G. Jotzu, T. Esslinger
- Physics
- 22 March 2017
Near-resonant periodic driving of quantum systems promises the implementation of a large variety of novel quantum states, though their preparation and measurement remains challenging. We address…
Exploring competing density order in the ionic Hubbard model with ultracold fermions.
- M. Messer, R. Desbuquois, T. Esslinger
- PhysicsPhysical Review Letters
- 18 March 2015
The ionic Hubbard model is realized using an interacting two-component gas of fermionic atoms loaded into an optical lattice and the externally broken inversion symmetry is not visible anymore in the density distribution.
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