Dynamics of highly unbalanced Bose-Bose mixtures: miscible vs. immiscible gases

Year: 2013

Authors: Sartori A., Recati A.,

Autors Affiliation: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy

Abstract: We study the collective modes of the minority component of a highly unbalanced Bose-Bose mixture. In the miscible case the minority component feels an effective external potential and we derive an analytical expression for the mode frequencies. The latter is independent of the minority component interaction strength. In the immiscible case we find that the ground state can be a two-domain walls soliton. Although the mode frequencies are continuous at the transition, their behaviour is very different with respect to the miscible case. The dynamical behaviour of the solitonic structure and the frequency dependence on the inter- and intra-species interaction is numerically studied using coupled Gross-Pitaevskii equations.

Journal/Review: EUROPEAN PHYSICAL JOURNAL D

Volume: 67 (12)      Pages from: 260-1  to: 260-7

More Information: We would like to thank Marta Abad for useful suggestions and for the reading of the present manuscript. We also acknowledge useful discussions with Franco Dalfovo, Giacomo Lamporesi, Lev Pitaevskii and Sandro Stringari. This work has been supported by ERC through the QGBE grant and by Provincia Autonoma di Trento.
KeyWords: Cold Matter, Quantum Gas
DOI: 10.1140/epjd/e2013-40635-x

Citations: 17
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