Optical-lattice-assisted magnetic phase transition in a spin-orbit-coupled Bose-Einstein condensate
| Autor: | Sandro Stringari, Tomoki Ozawa, Giovanni I. Martone, Chunlei Qu |
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| Přispěvatelé: | Università degli studi di Bari Aldo Moro (UNIBA), Istituto Nazionale di Fisica Nucleare, sezione di Bari (INFN, sezione di Bari), Istituto Nazionale di Fisica Nucleare (INFN), Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Università degli Studi di Trento (UNITN) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Quantum phase transition Condensed Matter::Quantum Gases [PHYS]Physics [physics] Optical lattice Condensed matter physics Bose gas FOS: Physical sciences Roton 01 natural sciences 7. Clean energy 010305 fluids & plasmas 3. Good health law.invention Particle in a one-dimensional lattice Quantum Gases (cond-mat.quant-gas) law Lattice (order) 0103 physical sciences Condensed Matter - Quantum Gases 010306 general physics Bose–Einstein condensate ComputingMilieux_MISCELLANEOUS Bloch wave |
| Zdroj: | Physical Review A Physical Review A, American Physical Society, 2016, 94 (4), pp.043629. ⟨10.1103/PhysRevA.94.043629⟩ Physical Review A, American Physical Society, 2016, 94 (4), pp.043629 |
| ISSN: | 1050-2947 1094-1622 |
| DOI: | 10.1103/PhysRevA.94.043629⟩ |
| Popis: | We investigate the effect of a periodic potential generated by a one-dimensional optical lattice on the magnetic properties of an $S=1/2$ spin-orbit-coupled Bose gas. By increasing the lattice strength one can achieve a magnetic phase transition between a polarized and an unpolarized Bloch wave phase, characterized by a significant enhancement of the contrast of the density fringes. If the wave vector of the periodic potential is chosen close to the roton momentum, the transition could take place at very small lattice intensities, revealing the strong enhancement of the response of the system to a weak density perturbation. By solving the Gross-Pitaevskii equation in the presence of a three-dimensional trapping potential, we shed light on the possibility of observing the magnetic phase transition in currently available experimental conditions. 10 pages, 6 figures. Revised version, published in PRA |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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