Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 32: Rydberg gasses I
A 32.5: Vortrag
Freitag, 10. März 2017, 12:00–12:15, HS 20
Stability and instabilities of bosonic crystalline quantum phases of Rydberg dressed lattice gases — •Andreas Geißler1, Mathieu Barbier1, Ulf Bissbort2, Yongqiang Li3, and Walter Hofstetter1 — 1Institut für Theoretische Physik, Goethe Universität Frankfurt am Main, Germany — 2Engineering Product Development, SUTD, Singapore — 3Department of Physics, NUDT, China
Recent experiments have shown the feasibility of Rydberg dressing [1], even in a lattice system [2], thus paving the way towards realizing exotic states of matter in ultracold gases. While our latest results have shown a rich diversity of crystalline and supersolid quantum phases in bosonic lattice systems [3], induced by the strong correlations due to Rydberg dressing, a better understanding of crystallisation is still required. We therefore analyse the instabilities due to quasiparticle excitations, which we determine from linearised Gutzwiller equations. Furthermore, we simulate the dissipative dynamics induced by the finite lifetime of Rydberg states and decoherence effects inherent to these driven systems. The Lindblad master equation is solved within a Gutzwiller mean-field description, which also allows for itinerant dynamics. We thus show the existence of exotic ordered steady states after various parameter sweeps, as well as the stability of these states.
[1] Y.-Y. Jau et al., Nat. Phys. 12, 71-74 (2016)
[2] J. Zeiher et al., arXiv:1602.06313
[3] A. Geißler et al., arXiv:1509.06292