The single-atom box: bosonic staircase and effects of parity

Details The single-atom box: bosonic staircase and effects of parity The single-atom box: bosonic staircase and effects of parity

2008-02-25

arxiv.org/abs/0802.3687v2

Phys. Rev. A 78, 031601(R) (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 included figues, published version

Scientific paper

10.1103/PhysRevA.78.031601

We have developed a theory of a Josephson junction formed by two tunnel-coupled Bose-Einstein condensates in a double-well potential in the regime of strong atom-atom interaction for an arbitrary total number $N$ of bosons in the condensates. The tunnel resonances in the junction are shown to be periodically spaced by the interaction energy, forming a single-atom staircase sensitive to the parity of $N$ even for large $N$. One of the manifestations of the staircase structure is the periodic modulation with the bias energy of the visibility of the interference pattern in lattices of junctions.

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