Correlation dynamics of dipolar bosons in 1D triple well optical lattice
2019
We study the correlation dynamics triggered by lattice depth quench in a system of three dipolar bosons in 1D triple well optical lattice from the first principle using the multiconfigurational time-dependent Hartree method for bosons (MCTDHB). The comparison with contact interaction is also presented. For forward quench $(V_{f} > V_{i})$, system exhibits the collapse-revival dynamics in the time evolution of normalized first-order Glauber's correlation function both for the contact as well as for the dipolar interaction which is reminiscent of the one observed in Greiner's experiment [Nature, {\bf 415} (2002)]. We define the collapse and revival time ratio as the figure of merit ($\tau$) which can uniquely distinguish the timescale of dynamics for dipolar interaction from that of contact interaction. In the reverse quench process $(V_{i} > V_{f})$, the superfluid state is never achieved for dipolar interaction. The long-range repulsive tail, in the dipolar interaction, inhibits the spread of correlation across the lattice sites. For contact interaction the collapse-revival dynamics is again set-up with a different timescale.
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