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Disordered Supersolids in the Extended Bose-Hubbard Model.
Fei Lin1, T A Maier2, V W Scarola3
1Department of Physics, Virginia Tech, Blacksburg, Virginia, 24061, USA.
Scientific Reports
|October 8, 2017
Summary
Disorder can suppress or enhance supersolid critical temperatures in the extended Bose-Hubbard model. Supersolids can persist despite moderate spatial disorder and thermal fluctuations on a simple cubic lattice.
Area of Science:
- Condensed matter physics
- Quantum simulation
Background:
- The extended Bose-Hubbard model describes diverse quantum systems like ultracold atoms in optical lattices.
- This model features a supersolid phase, a unique state where solid and superfluid properties coexist.
Purpose of the Study:
- Investigate the impact of disorder on the supersolid phase of the extended Bose-Hubbard model.
- Determine how disorder affects the critical temperature of supersolid formation.
Main Methods:
- Utilized quantum Monte Carlo simulations.
- Studied the extended Bose-Hubbard model on a simple cubic lattice.
Main Results:
- Disorder generally suppresses the maximum critical temperature for the supersolid phase.
- A specific parameter range was identified where disorder enhances the supersolid critical temperature.
- Supersolid phases demonstrate resilience to moderate spatial disorder and thermal fluctuations.
Conclusions:
- The extended Bose-Hubbard model with disorder presents complex phase behaviors.
- Supersolids are robust to certain levels of disorder and thermal effects in this model system.
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