Spin-dipole oscillation and polarizability of a binary Bose-Einstein condensate near the miscible-immiscible phase transition

Year: 2016

Authors: Bienaimé T., Fava E., Colzi G., Mordini C., Serafini S., Qu C., Stringari S., Lamporesi G., Ferrari G.

Autors Affiliation: Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Ist Nazl Fis Nucl, Trento Inst Fundamental Phys & Applicat, I-38123 Povo, Italy.

Abstract: We report on the measurement of the spin-dipole (SD) polarizability and of the frequency of theSDoscillation of a two-component Bose-Einstein condensate of sodium atoms occupying the vertical bar 3(2)S(1/2), F = 1, m(F) = +/- 1 > hyperfine states. This binary spin mixture presents the important properties of being, at the same time, fully miscible and rid of the limit set by buoyancy. It is also characterized by a huge enhancement of the SD polarizability and by the consequent softening of the frequency of the SD oscillation, due to the vicinity to the transition to the immiscible phase. The experimental data are successfully compared with the predictions of theory.

Journal/Review: PHYSICAL REVIEW A

Volume: 94 (6)      Pages from: 063652-1  to: 063652-5

More Information: We thank C. Salomon and G. Roati for discussions and a critical reading of the manuscript, and L. Festa for technical assistance at the early stage of the experiment. We acknowledge funding by the Provincia Autonoma di Trento, the QUIC grant of the Horizon 2020 FET program, and by the FIS (h) over bar project of the Istituto Nazionale di Fisica Nucleare.
KeyWords: spin mixture, spin-dipole oscillation, spin-dipole polarizability
DOI: 10.1103/PhysRevA.94.063652

Citations: 30
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