Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 52: Quantum Gases (Bosons) V
Q 52.7: Talk
Thursday, March 14, 2019, 15:30–15:45, S HS 037 Informatik
Decay-dephasing-induced steady states in bosonic Rydberg-excited quantum gases in an optical lattice — •Mathieu Barbier1, Andreas Geißler1,2, and Walter Hofstetter1 — 1Institut für Theoretische Physik, Goethe Universität, 60438 Frankfurt am Main, Germany — 2Laboratory of Quantum Physics, 67083 Université de Strasbourg, France
We investigate the possibility of realizing supersolid quantum phases in bosonic Rydberg-excited quantum lattice gases in the presence of non-unitary processes, by simulating the dynamical evolution starting from initial preparation in non-dissipative equilibrium states. Within Gutzwiller theory, we first analyze the many-body ground-state of a bosonic Rydberg-excited quantum gas in a two dimensional optical lattice for variable atomic hopping rates and Rabi detunings. Furthermore, we perform time evolution of different supersolid phases using the Lindblad-master equation. With the inclusion of two different non-unitary processes, namely spontaneous decay from a Rydberg state to the ground state and dephasing of the addressed Rydberg state, we study the effect of non-unitary processes on those quantum phases and observe long-lived states in the presence of decay and dephasing. We find that long-lived supersolid quantum phases are observable within a range of realistic decay and dephasing rates, while high rates cause any initial configuration to homogenize quickly, preventing possible supersolid formation.