Long-lived super-molecules and thier implication to many-body physics

Details Long-lived super-molecules and thier implication to many-body physics Long-lived super-molecules and thier implication to many-body physics

2011-12-09

arxiv.org/abs/1112.2035v1

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures

Scientific paper

We demonstrate that, in the presence of a microwave field, the effective interaction between polar molecules can be tuned to be attractive and so shallow that none or only a few bound states (super- molecules) can exist in the dilute limit. Binding energies, average sizes, and phase diagrams for both s-orbital (bosons) and p-orbital (fermions) dimers are systematically studied, together with bosonic trimer states. We explicitly show that the non-adiabatic transition rate can be easily tuned small for such ground state super-molecules, so that the system can be stable from collapse even near the associated potential resonance. Our results therefore suggest a feasible cold molecule system to investigate both novel few-body and many-body physics (for example, the p-wave BCS-BEC crossover for fermions and the paired condensate for bosons) that can not be easily accessed in single species atomic gases.

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