Observation of Magnetic Solitons in Two-Component Bose-Einstein Condensates

Year: 2020

Authors: Farolfi A., Trypogeorgos D., Mordini C., Lamporesi G., Ferrari G.

Autors Affiliation: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, and Trento Institute for Fundamental Physics and Applications, INFN, 38123 Povo, Italy

Abstract: We experimentally investigate the dynamics of spin solitary waves (magnetic solitons) in a harmonically trapped, binary superfluid mixture. We measure the in situ density of each pseudospin component and their relative local phase via an interferometric technique we developed and as such, fully characterize the magnetic solitons while they undergo oscillatory motion in the trap. Magnetic solitons exhibit non-dispersive, dissipationless longtime dynamics. By imprinting multiple magnetic solitons in our ultracold gas sample, we engineer binary collisions between solitons of either the same or opposite magnetization and map out their trajectories.


Volume: 125 (3)      Pages from: 030401-1  to: 030401-5

More Information: The authors are grateful to S. Stringari, F. Dalfovo, L. Pitaevskii, A. Recati, C. Qu, A. Gallemi, M. Lewenstein, and L. Tarruell for stimulating discussions. We acknowledge funding from the project NAQUAS of QuantERA ERA-NET Cofund in Quantum Technologies (Grant Agreement No. 731473) implemented within the European Union´s Horizon 2020 Programme, from Provincia Autonoma di Trento, and from INFN-TIFPA under the project FISh. We thank the BEC Center and the Q@TNinitiative.
KeyWords: spin waves, solitons, collisions
DOI: 10.1103/PhysRevLett.125.030401

Citations: 44
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