Hannover 2013 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 65: Quantum gases: Bosons III
Q 65.5: Talk
Friday, March 22, 2013, 15:15–15:30, F 342
Defect-induced supersolidy with soft-core Bosons — •Fabio Cinti1, Tommaso Macri1, Wolfgang Lechner2, Guido Pupillo3, and Thomas Pohl1 — 1Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany — 2IQOQI and Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria — 3ISIS (UMR 7006) and IPCMS (UMR 7504), Universite' de Strasbourg and CNRS, Strasbourg, France
More than 40 years after its conjecture by Andreev, Lifshitz and Chester the possible existence of continuous-space supersolids due to delocalized zero-point defects still remains under active debate. Here we show that soft-core Bosons confined to two-dimensions give rise to the emergence of this elusive state. We present a detailed study of the zero-temperature phase-diagram in the strongly coupled regime and identify conditions for defect-induced supersolidity, i.e. for the formation of an incommensurate crystal in the ground state of the system. In addition to displaying supersolidity the phase diagram shows a rich structure and contains other interesting phases, such as commensurate supersolid.