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Quantitative Determination of Temperature in the Approach to Magnetic Order of Ultracold Fermions in an Optical Lattice
Robert Jördens, Leticia Tarruell, Daniel Greif +12
We perform a quantitative simulation of the repulsive Fermi-Hubbard model using an ultracold gas trapped in an optical lattice. The entropy of the system is determined by comparing…
The Dicke Quantum Phase Transition with a Superfluid Gas in an Optical Cavity
Kristian Baumann, Christine Guerlin, Ferdinand Brennecke +1
A phase transition describes the sudden change of state in a physical system, such as the transition between a fluid and a solid. Quantum gases provide the opportunity to establish…
Observation of Elastic Doublon Decay in the Fermi-Hubbard Model
Niels Strohmaier, Daniel Greif, Robert Jördens +7
We investigate the decay of highly excited states of ultracold fermions in a three-dimensional optical lattice. Starting from a repulsive Fermi-Hubbard system near half filling, we…