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Supersolid phase with cold polar molecules on a triangular lattice
L Pollet1, J D Picon, H P Büchler
1Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA.
Physical Review Letters
|April 7, 2010
Summary
Researchers explored heteronuclear molecules on a triangular lattice, identifying conditions for a supersolid phase. They found a maximal critical temperature for supersolidity, suggesting feasible experimental realization.
Area of Science:
- Quantum physics
- Condensed matter physics
Background:
- Investigating quantum phases in ultracold atomic systems.
- Exploring the behavior of heteronuclear molecules on lattices.
Purpose of the Study:
- Analyze the potential for supersolid phase realization in heteronuclear molecules on a triangular lattice.
- Map the ground state phase diagram, including superfluid, solid, and supersolid phases.
- Investigate the influence of finite temperatures and strong interactions on phase behavior.
Main Methods:
- Theoretical modeling of a heteronuclear molecule system.
- Phase diagram analysis at ground state and finite temperatures.
- Derivation of critical temperature and entropy for supersolidity.
Main Results:
- Identified superfluid, solid, and supersolid phases in the ground state.
- Discovered an additional emulsion region at finite temperatures with strong interactions.
- Determined the maximal critical temperature (Tc) and entropy (S/N=0.04(1)) for supersolidity.
Conclusions:
- The studied system offers a viable platform for experimental supersolid realization.
- Feasible experimental conditions for achieving supersolidity have been identified.
- The presence of an emulsion region highlights unique characteristics compared to short-range interaction models.
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