Exploring the thermodynamics of spin-1 Bose gases with synthetic magnetization

Year: 2019

Authors: Orenes DB., Kowalczyk AU., Witkowska E., Barontini G.

Autors Affiliation: CNR, INO, Sez Sesto Fiorentino, I-50019 Sesto Fiorentino, Italy; Univ Birmingham, Midlands Ultracold Atom Res Ctr, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England; PAS, Inst Phys, Aleja Lotnikow 32-46, PL-02668 Warsaw, Poland.

Abstract: We study the thermodynamic properties of a spin-1 Bose gas across the Bose-Einstein condensation transition. We present the theoretical description of the thermodynamics of a trapped ideal spin-1 Bose gas and we describe the phases that can be obtained in this system as a function of the temperature and of the populations in the different spin components. We propose a simple way to realize a ‘synthetic magnetization’ that can be used to probe the entire phase diagram while keeping the real magnetization of the system fixed. We experimentally demonstrate the use of such method to explore different phases in a sample with zero total magnetization. Our work opens up new perspectives to study isothermal quenching dynamics through different magnetic phases in spinor condensates.

Journal/Review: NEW JOURNAL OF PHYSICS

Volume: 21      Pages from: 043024-1  to: 043024-9

KeyWords: spinor Bose-Einstein condensates; thermodynamics; ferromagnetism
DOI: 10.1088/1367-2630/ab14b4

Citations: 3
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