Detecting paired and counterflow superfluidity via dipole oscillations

Details Detecting paired and counterflow superfluidity via dipole oscillations Detecting paired and counterflow superfluidity via dipole oscillations

2011-03-17

arxiv.org/abs/1103.3513v3

Physics

Condensed Matter

Quantum Gases

4 pages,5 figures

Scientific paper

10.1103/PhysRevA.84.041609

We suggest an experimentally feasible procedure to observe paired and counterflow superfluidity in ultra-cold atom systems. We study the time evolution of one-dimensional mixtures of bosonic atoms in an optical lattice following an abrupt displacement of an additional weak confining potential. We find that the dynamic responses of the paired superfluid phase for attractive inter-species interactions and the counterflow superfluid phase for repulsive interactions are qualitatively distinct and reflect the quasi long-range order that characterizes these states. These findings suggest a clear experimental procedure to detect these phases, and give an intuitive insight into their dynamics.

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