Fate of a Bose-Einstein Condensate in the Presence of Spin-Orbit Coupling
arXiv:1210.5853 · doi:10.1103/PhysRevLett.110.140407
Abstract
Intensive theoretical studies have recently predicted that a Bose-Einstein condensate will exhibit a variety of novel properties if spin-orbit coupling is present. However, an unambiguous fact has also been pointed out: Rashba coupling destroys a condensate of noninteracting bosons even in high dimensions. Therefore, a conceptually important question arises as to whether or not a condensate exists in the presence of interaction and a general type of spin-orbit coupling. Here we show that interaction qualitatively changes the ground state of bosons under Rashba spin-orbit coupling. Any infinitesimal repulsion forces bosons either to condense at one or two momentum states or to form a superfragmented state that is a superposition of infinite numbers of fragmented condensates. The superfragmented state is unstable against the anisotropy of spin-orbit coupling in systems with large numbers of particles, leading to the revival of a condensate in current experiments.
Published version
References in corpus (6)
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- A Two-dimensional Algebraic Quantum Liquid Produced by an Atomic Simulator of the Quantum Lifshitz Model
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- Spin-Orbit Coupled One-Dimensional Fermi Gases with Infinite Repulsion
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- Spin-Orbit Coupled Bose Gases at Finite Temperatures
- Quantum Dynamical Phase Transition in a Spin-Orbit Coupled Bose Condensate
- Attractive Bose-Einstein condensates in anharmonic traps: Accurate numerical treatment and the intriguing physics of the variance
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- Hidden long-range order in a spin-orbit coupled two-dimensional Bose gas
- Density Dependent Spin-Orbit Coupling in Degenerate Quantum Gases
- Quantum-Fluctuation-Driven Dynamics of Droplet Splashing, Recoiling and Deposition in Ultracold Binary Bose Gases
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- BCS pairing state of a Dilute Bose Gas with Spin-Orbit Coupling
- Weyl spin-orbit-coupling-induced interactions in uniform and trapped atomic quantum fluids
- Magnetic and nematic phases in a Weyl type spin-orbit-coupled spin-1 Bose gas
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- Interference of longitudinal and transversal fragmentations in the Josephson tunneling dynamics of Bose-Einstein condensates
- Uncertainty product of an out-of-equilibrium Bose-Einstein condensate
- Evidence for correlated states in a cluster of bosons with Rashba spin-orbit coupling
- Spatially partitioned many-body vortices