Tricriticalities and Quantum Phases in Spin-Orbit-Coupled Spin-1 Bose Gases

Year: 2016

Authors: Martone GI., Pepe FV., Facchi P., Pascazio S., Stringari S.

Autors Affiliation: Univ Bari, Dipartimento Fis, I-70126 Bari, Italy; Univ Bari, MECENAS, I-70126 Bari, Italy; Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy; Museo Stor Fis & Ctr Studi & Ric Enrico Fermi, I-00184 Rome, Italy; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy.

Abstract: We study the zero-temperature phase diagram of a spin-orbit-coupled Bose-Einstein condensate of spin 1, with equally weighted Rashba and Dresselhaus couplings. Depending on the antiferromagnetic or ferromagnetic nature of the interactions, we find three kinds of striped phases with qualitatively different behaviors in the modulations of the density profiles. Phase transitions to the zero-momentum and the plane-wave phases can be induced in experiments by independently varying the Raman coupling strength and the quadratic Zeeman field. The properties of these transitions are investigated in detail, and the emergence of tricritical points, which are the direct consequence of the spin-dependent interactions, is explicitly discussed.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 117 (12)      Pages from: 125301-1  to: 125301-6

More Information: Insightful discussions with Giacomo Lamporesi, Yun Li, Chunlei Qu, and Zeng-Qiang Yu are acknowledged. This work was partially supported by PRIN Grant No. 2010LLKJBX Collective quantum phenomena: from strongly correlated systems to quantum simulators, by INFN through the project QUANTUM, by the Italian National Group of Mathematical Physics (GNFM-INdAM), by the QUIC grant of the Horizon2020 FET program, and by Provincia Autonoma di Trento.
KeyWords: Phase transitions; gases
DOI: 10.1103/PhysRevLett.117.125301

Citations: 69
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