Heterodimer of two distinguishable atoms in a one-dimensional optical lattice

Details Heterodimer of two distinguishable atoms in a one-dimensional optical lattice Heterodimer of two distinguishable atoms in a one-dimensional optical lattice

2011-05-31

arxiv.org/abs/1105.6324v2

Physical Review A 84, 033613 (2011)

Physics

Condensed Matter

Quantum Gases

Very close to published version

Scientific paper

10.1103/PhysRevA.84.033613

Within the Bose-Hubbard model, we theoretically determine the stationary states of two distinguishable atoms in a one-dimensional optical lattice and compare with the case of two identical bosons. A heterodimer has odd-parity dissociated states that do not depend on the interactions with the atoms, and the lattice momenta of the two atomic species may have different averages even for a bound state of the dimer. We discuss two possible methods of detecting the dimer. First, the different distributions of the quasimomenta of the two species may be observed in suitable time-of-flight experiments. Also, an asymmetry in the line shape as a function of the modulation frequency may reveal the presence of the odd-parity dissociated states when a heterodimer is dissociated by modulating the depth of the optical lattice.

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