28. 6. 2013. Seminar: Bo Xiong

Friday 28 June 2013 at 2PM
Zvonko Marić Room, seminar organized by Scientific Computing Laboratory

Dr. Bo Xiong
Scientific Computing Laboratory, Institute of Physics Belgrade

Many-site coherence revivals and correlated supersolid states in optical lattices with long-range interactions

Abstract:

We investigate the impact of long-range interactions (e.g., dipole-dipole interaction) in optical lattices on the dynamics of many-body waves when initial coherent states and supersolid states are quenched toward localized states. For initial coherent states, the exactly attenuated collapse and revival oscillations are unlikely to be captured by the conventional Gutzwiller treatment. We provide a modified variant of the Gutzwiller ansatz, reproducing the analytically calculated time dependence of first-order coherence in the limit of zero tunneling [1]. For initial supersolid states, unique coherence oscillation between the even and odd sublattice sites of the checkerboard are created by the quench, which are absent when the initial state is described by a Gutzwiller product state. This opens up the possibility to discriminate experimentally between mean-field and many-body origins of supersolidity [2].

[1] U. R. Fischer and B. Xiong, Phys. Rev. A 84, 063635 (2011).
[2] U. R. Fischer and B. Xiong, Europhys. Lett. 99, 66003 (2012).