Linear response theory for a pair of coupled one-dimensional condensates of interacting atoms
- 15 May 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 75 (17), 174511
- https://doi.org/10.1103/physrevb.75.174511
Abstract
We use the quantum sine-Gordon model to describe the low-energy dynamics of a pair of coupled one-dimensional condensates of interacting atoms. We show that the nontrivial excitation spectrum of the quantum sine-Gordon model, which includes soliton and breather excitations, can be observed in experiments with time-dependent modulation of the tunneling amplitude, potential difference between condensates, or phase of tunneling amplitude. We use the form-factor approach to compute structure factors corresponding to all three types of perturbations.Keywords
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