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Symmetry breaking and phase transitions in Bose-Einstein condensates with spin–orbital-angular-momentum coupling
- Source :
- Physical Review A. 102
- Publication Year :
- 2020
- Publisher :
- American Physical Society (APS), 2020.
-
Abstract
- Theoretical study is presented for a spinor Bose-Einstein condensate, whose two components are coupled by copropagating Raman beams with different orbital angular momenta. The investigation is focused on the behavior of the ground state of this condensate, depending on the atom-light coupling strength. By analyzing the ground state, we have identified a number of quantum phases, which reflect the symmetries of the effective Hamiltonian and are characterized by the specific structure of the wave function. In addition to the well-known stripe, polarized, and zero-momentum phases, our results show that the system can support phases whose wave functions contain a complex vortex molecule. Such a molecule plays an important role in the continuous phase transitions of the system. The predicted behavior of vortex-molecule phases can be examined in cold-atom experiments using currently existing techniques.
- Subjects :
- Condensed Matter::Quantum Gases
Physics
Phase transition
FOS: Physical sciences
Quantum phases
01 natural sciences
010305 fluids & plasmas
law.invention
symbols.namesake
Quantum Gases (cond-mat.quant-gas)
law
Quantum mechanics
0103 physical sciences
Angular momentum coupling
symbols
Symmetry breaking
Condensed Matter - Quantum Gases
010306 general physics
Ground state
Hamiltonian (quantum mechanics)
Wave function
Bose–Einstein condensate
Subjects
Details
- ISSN :
- 24699934 and 24699926
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Physical Review A
- Accession number :
- edsair.doi.dedup.....0cd7d5ce28f118b03799c8d17da2f6a2