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Interferometric approach to measuring band topology in 2D optical lattices
Dmitry A. Abanin, Takuya Kitagawa, Immanuel Bloch +1
Recently, optical lattices with non-zero Berry's phases of Bloch bands have been realized. New approaches for measuring Berry's phases and topological properties of bands with expe…
Negative Absolute Temperature for Motional Degrees of Freedom
Simon Braun, Jens Philipp Ronzheimer, Michael Schreiber +4
Absolute temperature, the fundamental temperature scale in thermodynamics, is usually bound to be positive. Under special conditions, however, negative temperatures - where high-en…
Observation of mesoscopic crystalline structures in a two-dimensional Rydberg gas
Peter Schauß, Marc Cheneau, Manuel Endres +7
The ability to control and tune interactions in ultracold atomic gases has paved the way towards the realization of new phases of matter. Whereas experiments have so far achieved a…