Occupancy-driven Zeeman suppression and inversion in trapped polariton condensates

• URL: http://arxiv.org/abs/2308.05351v2
• Date: Tue, 13 Aug 2024 09:16:42 GMT
• Title: Occupancy-driven Zeeman suppression and inversion in trapped polariton condensates
• Authors: Krzysztof Sawicki, Dmitriy Dovzhenko, Yuan Wang, Helgi Sigurðsson, Pavlos G. Lagoudakis,
• Abstract summary: We study the magneto-photoluminescence of an optically trapped exciton-polariton condensate in a semiconductor microcavity with multiple In0.08Ga0.92As quantum wells. We observe polariton Zeeman splitting and, in small traps with tight confinement, demonstrate its full parametric screening. For larger optical traps, we observe a complete inversion in the Zeeman splitting as a function of power, underlining the importance of condensate confinement and interactions with its background reservoir excitons.
• Score: 8.740132189485855
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We study the magneto-photoluminescence of an optically trapped exciton-polariton condensate in a planar semiconductor microcavity with multiple In0.08Ga0.92As quantum wells. Extremely high condensate coherence time and continuous control over the polariton confinement are among the advantages provided by optical trapping. This allows us to resolve magnetically induced {\mu}eV fine-energy shifts in the condensate and identify unusual dynamical regions in its parameter space. We observe polariton Zeeman splitting and, in small traps with tight confinement, demonstrate its full parametric screening when the condensate density exceeds a critical value, reminiscent of the spin-Meissner effect. For larger optical traps, we observe a complete inversion in the Zeeman splitting as a function of power, underlining the importance of condensate confinement and interactions with its background reservoir excitons.

Related papers

• Effect of magnetic field on the Bose-Einstein condensation of quantum well exciton-polaritons [0.0]
  We investigate the effects of a magnetic field on the relaxation process of exciton-polaritons toward Bose-Einstein condensation in GaAs quantum wells. Our study reveals that the modification of the exciton's effective mass, Rabi splitting, and dispersion significantly alters the relaxation rate of polaritons as they approach condensation.
  arXiv  Detail & Related papers  (2024-04-01T07:25:25Z)
• The strongly driven Fermi polaron [49.81410781350196]
  Quasiparticles are emergent excitations of matter that underlie much of our understanding of quantum many-body systems. We take advantage of the clean setting of homogeneous quantum gases and fast radio-frequency control to manipulate Fermi polarons. We measure the decay rate and the quasiparticle residue of the driven polaron from the Rabi oscillations between the two internal states.
  arXiv  Detail & Related papers  (2023-08-10T17:59:51Z)
• Optically driven spin precession in polariton condensates [0.0]
  We introduce an all-optically driven spin precession in microcavity polariton condensates. We realise several GHz driven spin precession with a macroscopic spin coherence time that is limited only by the extraneous to the condensate. Our observations are supported by mean field modelling and evidence a driven-dissipative quantum fluidic analogue of the nuclear magnetic resonance effect.
  arXiv  Detail & Related papers  (2023-05-05T18:30:24Z)
• Resolving Fock states near the Kerr-free point of a superconducting resonator [51.03394077656548]
  We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement) We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
  arXiv  Detail & Related papers  (2022-10-18T09:55:58Z)
• Photon generation and entanglement in a double superconducting cavity [105.54048699217668]
  We study the dynamical Casimir effect in a double superconducting cavity in a quantum electrodynamics architecture. We study the creation of photons when the walls oscillate harmonically with a small amplitude.
  arXiv  Detail & Related papers  (2022-07-18T16:43:47Z)
• Quantum Fluctuations and Coherence of a Molecular Polariton Condensate [0.5801044612920816]
  A full quantum theory is developed for an exciton polariton condensate. The polariton nonlinearity causing fast relaxation correlated with the pump so as to yield the condensation at threshold. The results signify the role of dark states for polariton fluctuations, and lead to a nonclassical counting statistics of emitted photons.
  arXiv  Detail & Related papers  (2022-04-28T14:27:05Z)
• Crystallization of Bosonic Quantum Hall States [0.0]
  We study the purely interaction-driven dynamics of a Landau gauge Bose-Einstein condensate in and near the lowest Landau level (LLL) We observe a spontaneous crystallization driven by condensation of magneto-rotons, excitations visible as density modulations at the magnetic length.
  arXiv  Detail & Related papers  (2021-06-21T17:56:11Z)
• Faraday imaging induced squeezing of a double-well Bose-Einstein condensate [0.0]
  We examine how non-destructive measurements generate spin squeezing in an atomic Bose-Einstein condensate confined in a double-well trap. The condensate in each well is monitored using coherent light beams in a Mach-Zehnder configuration that interacts with the atoms through a quantum nondemolition Hamiltonian. We find that monitoring the condensate at zero detection current and with identical coherent light beams minimizes the backaction of the measurement on the atoms.
  arXiv  Detail & Related papers  (2021-04-06T09:16:04Z)
• Multimode-polariton superradiance via Floquet engineering [55.41644538483948]
  We consider an ensemble of ultracold bosonic atoms within a near-planar cavity, driven by a far detuned laser. We show that a strong, dispersive atom-photon coupling can be reached for many transverse cavity modes at once. The resulting Floquet polaritons involve a superposition of a set of cavity modes with a density of excitation of the atomic cloud.
  arXiv  Detail & Related papers  (2020-11-24T19:00:04Z)
• Optically pumped spin polarization as a probe of many-body thermalization [50.591267188664666]
  We study the spin diffusion dynamics of 13C in diamond, which we dynamically polarize at room temperature via optical spin pumping of engineered color centers. We find good thermal contact throughout the nuclear spin bath, virtually independent of the hyperfine coupling strength. Our results open intriguing opportunities to study the onset of thermalization in a system by controlling the internal interactions within the bath.
  arXiv  Detail & Related papers  (2020-05-01T23:16:33Z)
• Entanglement dynamics in dissipative photonic Mott insulators [62.997667081978825]
  In spite of particle losses the quantum entanglement propagation exhibits a ballistic character with propagation speeds related to the differerent quasiparticles that are involved in the dynamics. Our analysis reveals that photon dissipation has a strikingly asymmetric behavior in the two configurations with a much more dramatic role on the holon entanglement propagation than for the doublon case.
  arXiv  Detail & Related papers  (2020-04-27T15:48:24Z)

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.