Transverse Josephson vortices and localized states in stacked Bose-Einstein condensates
| Autor: | J. A. Gil Granados, M. Guilleumas, A. Muñoz Mateo, X. Viñas |
|---|---|
| Přispěvatelé: | Universitat de Barcelona |
| Rok vydání: | 2018 |
| Předmět: |
Josephson effect
Tunneling (Physics) General Physics and Astronomy FOS: Physical sciences Bose-Einstein condensation Ones no lineals 01 natural sciences 010305 fluids & plasmas law.invention law Condensed Matter::Superconductivity 0103 physical sciences Periodic boundary conditions Condensació de Bose-Einstein Efecte túnel 010306 general physics Quantum tunnelling Nonlinear waves Physics Superconductivity Condensed Matter::Quantum Gases Condensed matter physics Degenerate energy levels Transverse plane Quantum Gases (cond-mat.quant-gas) Condensed Matter - Quantum Gases Bose–Einstein condensate Bloch wave |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de la UB Universidad de Barcelona |
| DOI: | 10.48550/arxiv.1810.06069 |
| Popis: | The stacks of Bose-Einstein condensates coupled by long Josephson junctions present a rich phenomenology feasible to experimental realization and specially suitable for technological applications as the nonlinear-optics and superconducting analogues have already proved. Among this, we show that transverse Bloch waves excited in arrays of one-dimensional coupled condensates can carry tunneling superflows whose dynamical stability depends on the quasimomentum. Across the stacks with periodic boundary conditions, forming closed ring-shaped systems, such Bloch states yield transverse Josephson vortices with a generic non-integer circulation in units of $h/m$. Additionally, the superpositions of degenerate linear Bloch waves can suppress the supercurrents and give rise to families of nonlinear standing-wave states with strong (transverse) spatial localization. Stable states of this type can also be found in finite size systems. Comment: 14 pages, 8 figures |
| Databáze: | OpenAIRE |
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