Optical-lattice-assisted magnetic phase transition in a spin-orbit-coupled Bose-Einstein condensate

Abstract

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

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Cited by in corpus (11)

• Experimental realization of a superfluid stripe phase in a spin-orbit-coupled Bose-Einstein condensate enabled by momentum-space hopping
• Momentum-Space Josephson Effects
• Real space mean-field theory of a spin-1 Bose gas in synthetic dimensions
• Quantum Phases of Two-Component Bosons with Spin-Orbit Coupling in Optical Lattices
• Bosons with incommensurate potential and spin-orbit coupling
• Quantum phases and collective excitations of a spin-orbit-coupled Bose-Einstein condensate in a one-dimensional optical lattice
• Pseudo-Goldstone Excitations in a Striped Bose-Einstein Condensate
• Bose-Einstein condensates with Raman-induced spin-orbit coupling : An overview
• Density dependent gauge field inducing emergent SSH physics, solitons and condensates in a discrete nonlinear Schrödinger equation
• Stabilizing period-doubled density waves by spin-orbit coupling in Bose-Einstein condensates in optical lattices
• Band-edge superfluid of Bose-Einstein condensates in the spin-orbit-coupled Zeeman lattice