Nonequilibrium Josephson Oscillations in Bose-Einstein Condensates without Dissipation. / Trujillo-Martinez, Mauricio; Posazhennikova, Anna; Kroha, Johann.

In: Physical Review Letters, Vol. 103, No. 10, 105302, 04.09.2009.

Research output: Contribution to journalLetterpeer-review



We perform a detailed quantum dynamical study of nonequilibrium Josephson oscillations between interacting Bose-Einstein condensates confined in a finite-size double-well trap. We find that the Josephson junction can sustain multiple undamped Josephson oscillations up to a characteristic time scale τc without quasipartcles being excited in the system. This may explain recent related experiments. Beyond a characteristic time scale τc the dynamics of the junction is governed by fast, quasiparticle-assisted Josephson tunneling as well as Rabi oscillations between the discrete quasiparticle levels. We predict that an initially self-trapped state of the Bose-Einstein condensates will be destroyed by these fast dynamics.
Original languageEnglish
Article number105302
Number of pages4
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 4 Sep 2009
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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