Gritsev, VladimirPolkovnikov, AnatoliDemler, Eugene2016-08-242007Gritsev, Vladimir, Anatoli Polkovnikov, and Eugene Demler. 2007. “Linear Response Theory for a Pair of Coupled One-Dimensional Condensates of Interacting Atoms.” Physical Review B 75 (17) (May 15). doi:10.1103/physrevb.75.174511.1098-0121http://nrs.harvard.edu/urn-3:HUL.InstRepos:27891677We 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.en-USJournal Article2016-08-2410.1103/PhysRevB.75.174511