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Dynamically generated double occupancy as a probe of cold atom systems.

S D Huber1, A Rüegg

  • 1Theoretische Physik, ETH Zurich, CH-8093 Zürich, Switzerland.

Physical Review Letters
|March 5, 2009
PubMed
Summary
This summary is machine-generated.

Dynamically generating double occupancy in optical lattices can reveal quantum phases. This study theoretically validates the technique for detecting Mott phases in fermionic atoms, requiring very low temperatures.

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Area of Science:

  • Quantum physics
  • Atomic physics
  • Condensed matter physics

Background:

  • Investigating quantum phases in optical lattice systems presents significant experimental hurdles.
  • Dynamical generation of double occupancy by modulating hopping amplitude (t) is a recent technique to probe strongly correlated fermionic atoms.

Purpose of the Study:

  • To theoretically validate the experimental technique of dynamical double occupancy generation.
  • To confirm its utility in characterizing strongly correlated phases, specifically the Mott phase.

Main Methods:

  • Theoretical study of the driven Hubbard model.
  • Application of analytic methods for validation.

Main Results:

  • Conclusive evidence for a Mott phase can be inferred from the double occupancy measurement.
  • The technique's success is contingent on achieving sufficiently low temperatures (k_{B}T << t).

Conclusions:

  • The experimental method of dynamical double occupancy generation is theoretically validated for detecting Mott phases.
  • Achieving ultralow temperatures is crucial for the reliable characterization of quantum phases in optical lattice systems.