Rashba-type spin-orbit coupling in bilayer Bose-Einstein condensates

S. W. Su, S. C. Gou, Q. Sun, L. Wen, W. M. Liu, A. C. Ji, J. Ruseckas, G. Juzeliunas

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We explore a way of producing the Rashba spin-orbit coupling (SOC) for ultracold atoms by using a two-component (spinor) atomic Bose-Einstein condensate (BEC) confined in a bilayer geometry. The SOC of the Rashba type is created if the atoms pick up a π phase after completing a cyclic transition between four combined spin-layer states composed of two spin and two layer states. The cyclic coupling of the spin-layer states is carried out by combining an intralayer Raman coupling and an interlayer laser assisted tunneling. We theoretically determine the ground-state phases of the spin-orbit-coupled BEC for various strengths of the atom-atom interaction and the laser-assisted coupling. It is shown that the bilayer scheme provides a diverse ground-state phase diagram. In an intermediate range of the atom-light coupling two interlacing lattices of half-skyrmions and half-antiskyrmions are spontaneously created. In the strong-coupling regime, where the SOC of the Rashba type is formed, the ground state represents plane-wave or standing-wave phases depending on the interaction between the atoms. A variational analysis is shown to be in good agreement with the numerical results.

Original languageEnglish
Article number053630
JournalPhysical Review A
Volume93
Issue number5
DOIs
Publication statusPublished - 2016 May 31

Fingerprint

Bose-Einstein condensates
orbits
atoms
ground state
standing waves
lasers
interlayers
plane waves
phase diagrams
interactions
geometry

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Su, S. W., Gou, S. C., Sun, Q., Wen, L., Liu, W. M., Ji, A. C., ... Juzeliunas, G. (2016). Rashba-type spin-orbit coupling in bilayer Bose-Einstein condensates. Physical Review A, 93(5), [053630]. https://doi.org/10.1103/PhysRevA.93.053630
Su, S. W. ; Gou, S. C. ; Sun, Q. ; Wen, L. ; Liu, W. M. ; Ji, A. C. ; Ruseckas, J. ; Juzeliunas, G. / Rashba-type spin-orbit coupling in bilayer Bose-Einstein condensates. In: Physical Review A. 2016 ; Vol. 93, No. 5.
@article{f22c197a337b49ea827789bb3c4e160e,
title = "Rashba-type spin-orbit coupling in bilayer Bose-Einstein condensates",
abstract = "We explore a way of producing the Rashba spin-orbit coupling (SOC) for ultracold atoms by using a two-component (spinor) atomic Bose-Einstein condensate (BEC) confined in a bilayer geometry. The SOC of the Rashba type is created if the atoms pick up a π phase after completing a cyclic transition between four combined spin-layer states composed of two spin and two layer states. The cyclic coupling of the spin-layer states is carried out by combining an intralayer Raman coupling and an interlayer laser assisted tunneling. We theoretically determine the ground-state phases of the spin-orbit-coupled BEC for various strengths of the atom-atom interaction and the laser-assisted coupling. It is shown that the bilayer scheme provides a diverse ground-state phase diagram. In an intermediate range of the atom-light coupling two interlacing lattices of half-skyrmions and half-antiskyrmions are spontaneously created. In the strong-coupling regime, where the SOC of the Rashba type is formed, the ground state represents plane-wave or standing-wave phases depending on the interaction between the atoms. A variational analysis is shown to be in good agreement with the numerical results.",
author = "Su, {S. W.} and Gou, {S. C.} and Q. Sun and L. Wen and Liu, {W. M.} and Ji, {A. C.} and J. Ruseckas and G. Juzeliunas",
year = "2016",
month = "5",
day = "31",
doi = "10.1103/PhysRevA.93.053630",
language = "English",
volume = "93",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "5",

}

Su, SW, Gou, SC, Sun, Q, Wen, L, Liu, WM, Ji, AC, Ruseckas, J & Juzeliunas, G 2016, 'Rashba-type spin-orbit coupling in bilayer Bose-Einstein condensates', Physical Review A, vol. 93, no. 5, 053630. https://doi.org/10.1103/PhysRevA.93.053630

Rashba-type spin-orbit coupling in bilayer Bose-Einstein condensates. / Su, S. W.; Gou, S. C.; Sun, Q.; Wen, L.; Liu, W. M.; Ji, A. C.; Ruseckas, J.; Juzeliunas, G.

In: Physical Review A, Vol. 93, No. 5, 053630, 31.05.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Rashba-type spin-orbit coupling in bilayer Bose-Einstein condensates

AU - Su, S. W.

AU - Gou, S. C.

AU - Sun, Q.

AU - Wen, L.

AU - Liu, W. M.

AU - Ji, A. C.

AU - Ruseckas, J.

AU - Juzeliunas, G.

PY - 2016/5/31

Y1 - 2016/5/31

N2 - We explore a way of producing the Rashba spin-orbit coupling (SOC) for ultracold atoms by using a two-component (spinor) atomic Bose-Einstein condensate (BEC) confined in a bilayer geometry. The SOC of the Rashba type is created if the atoms pick up a π phase after completing a cyclic transition between four combined spin-layer states composed of two spin and two layer states. The cyclic coupling of the spin-layer states is carried out by combining an intralayer Raman coupling and an interlayer laser assisted tunneling. We theoretically determine the ground-state phases of the spin-orbit-coupled BEC for various strengths of the atom-atom interaction and the laser-assisted coupling. It is shown that the bilayer scheme provides a diverse ground-state phase diagram. In an intermediate range of the atom-light coupling two interlacing lattices of half-skyrmions and half-antiskyrmions are spontaneously created. In the strong-coupling regime, where the SOC of the Rashba type is formed, the ground state represents plane-wave or standing-wave phases depending on the interaction between the atoms. A variational analysis is shown to be in good agreement with the numerical results.

AB - We explore a way of producing the Rashba spin-orbit coupling (SOC) for ultracold atoms by using a two-component (spinor) atomic Bose-Einstein condensate (BEC) confined in a bilayer geometry. The SOC of the Rashba type is created if the atoms pick up a π phase after completing a cyclic transition between four combined spin-layer states composed of two spin and two layer states. The cyclic coupling of the spin-layer states is carried out by combining an intralayer Raman coupling and an interlayer laser assisted tunneling. We theoretically determine the ground-state phases of the spin-orbit-coupled BEC for various strengths of the atom-atom interaction and the laser-assisted coupling. It is shown that the bilayer scheme provides a diverse ground-state phase diagram. In an intermediate range of the atom-light coupling two interlacing lattices of half-skyrmions and half-antiskyrmions are spontaneously created. In the strong-coupling regime, where the SOC of the Rashba type is formed, the ground state represents plane-wave or standing-wave phases depending on the interaction between the atoms. A variational analysis is shown to be in good agreement with the numerical results.

UR - http://www.scopus.com/inward/record.url?scp=84973482317&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84973482317&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.93.053630

DO - 10.1103/PhysRevA.93.053630

M3 - Article

AN - SCOPUS:84973482317

VL - 93

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 5

M1 - 053630

ER -