Stability of vortices in exciton-polariton condensates with spin-orbital-angular-momentum coupling

• URL: http://arxiv.org/abs/2401.17927v2
• Date: Sat, 4 May 2024 02:29:15 GMT
• Title: Stability of vortices in exciton-polariton condensates with spin-orbital-angular-momentum coupling
• Authors: Xin-Xin Yang, Wei Zhang, Zhen-Xia Niu,
• Abstract summary: Spin-orbital-angular-momentum coupling (SOAMC) has been experimentally achieved to create vortices in atomic Bose-Einstein condensates. We analyze the emergence and configuration of vortices under a finite-size circular pumping beam.
• Score: 4.192911518544998
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The existence and dynamics of stable quantized vortices is an important subject of quantum many-body physics. Spin-orbital-angular-momentum coupling (SOAMC), a special type of spin-orbit coupling, has been experimentally achieved to create vortices in atomic Bose-Einstein condensates (BEC). Here, we generalize the concept of SOAMC to a two-component polariton BEC and analyze the emergence and configuration of vortices under a finite-size circular pumping beam. We find that the regular configuration of vortex lattices induced by a finite-size circular pump is significantly distorted by the spatially dependent Raman coupling of SOAMC, even in the presence of a repulsive polariton interaction which can assist the forming of stable vortex configuration. Meanwhile, a pair of vortices induced by SOAMC located at the center of polariton cloud remains stable. When the Raman coupling is sufficiently strong and interaction is weak, the vortices spiraling in from the edge of polariton cloud will disrupt the polariton BEC.

Related papers

• Dipole-dipole interactions mediated by a photonic flat band [44.99833362998488]
  We study the photon-dipole interactions between emitters dispersively coupled to the photonic analogue of a flat band (FB) We show that the strength of such photon-mediated interactions decays exponentially with distance with a characteristic localization length. We find that the localization length grows with the overlap between CLSs according to an analytically-derived universal scaling law valid for a large class of FBs both in 1D and 2D.
  arXiv  Detail & Related papers  (2024-05-30T18:00:05Z)
• Composite cores of monopoles and Alice rings in spin-2 Bose-Einstein condensates [0.0]
  We show that energy relaxation causes a point defect in the uniaxial-nematic phase of a spin-2 Bose-Einstein condensate to deform into a spin-Alice ring. An outer biaxial-nematic core exhibits a spin half-quantum vortex structure with a uniaxial-nematic inner core.
  arXiv  Detail & Related papers  (2024-01-08T18:59:06Z)
• Dynamics of inhomogeneous spin ensembles with all-to-all interactions: breaking permutational invariance [49.1574468325115]
  We investigate the consequences of introducing non-uniform initial conditions in the dynamics of spin ensembles characterized by all-to-all interactions. We find that the dynamics of the spin ensemble now spans a more expansive effective Hilbert space.
  arXiv  Detail & Related papers  (2023-09-19T16:44:14Z)
• Vortex structure and spectrum of atomic Fermi superfluid in a spherical bubble trap [1.6783263028241486]
  The structures of multiply quantized vortices (MQVs) of equal-population atomic Fermi superfluid are analyzed. The energy spectrum shows the number of the in-gap state branches corresponds to the vorticity of a vortex.
  arXiv  Detail & Related papers  (2023-08-19T16:03:44Z)
• Toroidal Dipolar Supersolid with a Rotating Weak Link [0.0]
  We study the effects of a weak-link system on dipolar supersolids. We find that metastable persistent currents may exist in the supersolid phase near the superfluid transition point. When stirring the weak link rapidly enough, we show that vortices can enter the supersolid.
  arXiv  Detail & Related papers  (2023-05-04T16:19:37Z)
• Slow semiclassical dynamics of a two-dimensional Hubbard model in disorder-free potentials [77.34726150561087]
  We show that introduction of harmonic and spin-dependent linear potentials sufficiently validates fTWA for longer times. In particular, we focus on a finite two-dimensional system and show that at intermediate linear potential strength, the addition of a harmonic potential and spin dependence of the tilt, results in subdiffusive dynamics.
  arXiv  Detail & Related papers  (2022-10-03T16:51:25Z)
• Self-organized PT-symmetry of exciton-polariton condensate in a double-well potential [0.0]
  We investigate the dynamics and stationary states of a semiconductor exciton-polariton condensate in a double well potential. We find that upon the population build up of the polaritons by above-threshold laser pumping, coherence relaxation due to the phase fluctuations of the polaritons drives the system into a stable fixed point corresponding to a self-organized PT-symmetric phase.
  arXiv  Detail & Related papers  (2021-07-04T16:20:13Z)
• Nonequilibrium Casimir effects of nonreciprocal surface waves [52.12351460454646]
  We show that an isotropic dipolar particle in the vicinity of a substrate made of nonreciprocal plasmonic materials can experience a lateral Casimir force and torque. We connect the existence of the lateral force to the asymmetric dispersion of nonreciprocal surface polaritons and the existence of the lateral torque to the spin-momentum locking of such surface waves.
  arXiv  Detail & Related papers  (2021-06-19T23:10:04Z)
• Many-Body Phases of a Planar Bose-Einstein Condensate with Cavity-Induced Spin-Orbit Coupling [0.0]
  We explore the many-body phases of a two-dimensional Bose-Einstein condensate with cavity-mediated spin-orbit coupling. By the help of two transverse non-interfering, counterpropagating pump lasers and a single standing-wave cavity mode, two degenerate Zeeman sub-levels of the quantum gas are Raman coupled in a double-$Lambda$-configuration. We identify three quantum phases with distinct atomic and photonic properties: the normal homogeneous'' phase, the superradiant spin-helix'' phase, and the superradiant
  arXiv  Detail & Related papers  (2020-09-14T14:31:47Z)
• Parallel dark soliton pair in a bistable 2D exciton-polariton superfluid [47.187609203210705]
  2D dark solitons are unstable and collapse into vortices due to snake instabilities. We demonstrate that a pair of dark solitons can be formed in the wake of an obstacle in a polariton flow resonantly supported by a homogeneous laser beam.
  arXiv  Detail & Related papers  (2020-03-25T13:52:22Z)
• Entanglement robustness to excitonic spin precession in a quantum dot [43.55994393060723]
  A semiconductor quantum dot (QD) is an attractive resource to generate polarization-entangled photon pairs. We study the excitonic spin precession (flip-flop) in a family of QDs with different excitonic fine-structure splitting (FSS) Our results reveal that coherent processes leave the time post-selected entanglement of QDs unaffected while changing the eigenstates of the system.
  arXiv  Detail & Related papers  (2020-01-31T13:50:51Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.