Visibility and stability of superstripes in a spin-orbit-coupled Bose-Einstein condensate

Abstract

We consider a spin-$1/2$ Bose-Einstein condensate with equal Rashba and Dresselhaus spin-orbit coupling. After reviewing some relevant features of the quantum phases of the system, we present a short study on how their properties are changed by the presence of non-zero magnetic detunings and spin-asymmetric interactions. At small values of the Raman coupling and of the magnetic field the so-called stripe phase occurs, which displays both superfluidity and periodic density modulations, in analogy with supersolids. We finally review a recent proposal (Phys. Rev. A 90, 041604) to improve the visibility of the fringes, based on the space separation of the two spin components into a 2D bi-layer configuration and on the application of a $\pi /2$ Bragg pulse, and we show that this new configuration also yields a sizable increase of the stability of the stripe phase against magnetic fluctuations.

11 pages, 6 figures, peer-reviewed conference proceedings published on the EPJ-ST volume "Novel Quantum Phases and Mesoscopic Physics in Quantum Gases". The content of this article has been partially included in the review paper arXiv:1410.5526

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Cited by in corpus (9)

• Observation of the supersolid stripe phase in spin-orbit coupled Bose-Einstein condensates
• Exciting the Goldstone Modes of a Supersolid Spin-Orbit-Coupled Bose Gas
• Bose-Einstein condensation with spin-orbit coupling
• Dynamics of Stripe Patterns in Supersolid Spin-Orbit-Coupled Bose Gases
• Probing supersolidity through excitations in a spin-orbit-coupled Bose-Einstein condensate
• Drag force and superfluidity in the supersolid stripe phase of a spin-orbit-coupled Bose-Einstein condensate
• Bose-Einstein condensates with Raman-induced spin-orbit coupling : An overview
• Imaginary spin-orbital coupling in parity-time symmetric systems with momentum-dependent gain and loss
• Bound-State Band Reconstruction and Resonance in Spin-1/2 Bose Gas with 1D Spin-Orbit Coupling