Off-axis optical vortices using double-Raman singlet and doublet light-matter schemes

• URL: http://arxiv.org/abs/2002.00504v2
• Date: Tue, 4 Feb 2020 22:02:46 GMT
• Title: Off-axis optical vortices using double-Raman singlet and doublet light-matter schemes
• Authors: Hamid Reza Hamedi, Julius Ruseckas, Emmanuel Paspalakis and Gediminas Juzeli\=unas
• Abstract summary: We study the formation of off-axis optical vortices propagating inside a double-Raman gain atomic medium. The atoms interact with two weak probe fields as well as two strong pump beams which can carry orbital angular momentum (OAM)
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study the formation of off-axis optical vortices propagating inside a double-Raman gain atomic medium. The atoms interact with two weak probe fields as well as two strong pump beams which can carry orbital angular momentum (OAM). We consider a situation when only one of the strong pump lasers carries an OAM. A particular superposition of probe fields coupled to the matter is shown to form specific optical vortices with shifted axes. Such off-axis vortices can propagate inside the medium with sub- or superluminal group velocity depending on the value of the two-photon detuning. The superluminal optical vortices are associated with the amplification as the energy of pump fields is transferred to the probe fields. The position of the peripheral vortices can be manipulated by the OAM and intensity of the pump fields. We show that the exchange of optical vortices is possible between individual probe beams and the pump fields when the amplitude of the second probe field is zero at the beginning of the atomic cloud. The model is extended to a more complex double Raman doublet interacting with four pump fields. In contrast to the double-Raman-singlet, now the generation of the off-axis sub- or superluminal optical vortices is possible even for zero two-photon detuning.

Related papers

• Nonlinear spectroscopy of semiconductor moiré materials [0.0]
  We use time-resolved nonlinear pump--probe measurements to reveal features of semiconductor moir'e materials. We generate a high density of virtual excitons or exciton--polarons in various moir'e minibands.
  arXiv  Detail & Related papers  (2024-02-26T15:02:51Z)
• Dissipative stabilization of maximal entanglement between non-identical emitters via two-photon excitation [49.1574468325115]
  Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement. We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
  arXiv  Detail & Related papers  (2023-06-09T16:49:55Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• Quantum vortices of strongly interacting photons [52.131490211964014]
  Vortices are hallmark of nontrivial dynamics in nonlinear physics. We report on the realization of quantum vortices resulting from a strong photon-photon interaction in a quantum nonlinear optical medium. For three photons, the formation of vortex lines and a central vortex ring attests to a genuine three-photon interaction.
  arXiv  Detail & Related papers  (2023-02-12T18:11:04Z)
• 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)
• Squeezing lights via a levitated cavity optomechanics [0.6091702876917279]
  We consider an optically levitated nano-particle in a bichromatic cavity, in which two cavity modes could be excited by the scattering photons of the dual-tweezers respectively. The ultra-strong coupling between the cavity field and torsional motion of nano-particle could be achieved for the current experimental conditions. Even at room temperature, the single-mode light can be squeezed for more than 17 dB, which is far beyond the 3 dB limit.
  arXiv  Detail & Related papers  (2021-12-30T14:52:19Z)
• Spatiotemporal entanglement in a noncollinear optical parametric amplifier [0.0]
  We investigate the generation of two entangled beams of light in the process of single-pass type parametric conversion down with an ultra-short pulsed pump. We find the degenerate-temporal eigenmodes and the corresponding squeezing eigenvalues of the generated field both numerically and analytically.
  arXiv  Detail & Related papers  (2020-09-22T13:04:21Z)
• Engineering multipartite entangled states in doubly pumped parametric down-conversion processes [68.8204255655161]
  We investigate the quantum state generated by optical parametric down-conversion in a $chi(2) $ medium driven by two modes. The analysis shows the emergence of multipartite, namely 3- or 4-partite, entangled states in a subset of the modes generated by the process.
  arXiv  Detail & Related papers  (2020-07-23T13:53:12Z)
• Polarization Control of Radiation and Energy Flow in Dipole-Coupled Nanorings [0.0]
  Collective optical excitations in sub-wavelength spaced quantum emitters exhibit extreme sub-radiance and field confinement. We show that energy shifts, radiative lifetimes, and emission patterns of excitons and biexcitons in such rings can be tailored via the orientation of the individual dipoles.
  arXiv  Detail & Related papers  (2020-04-21T09:38:57Z)
• Quantum noise correlations of an optical parametric oscillator based on a non-degenerate four wave mixing process in hot alkali atoms [0.0]
  This measurement is based on parametric amplification by non degenerate four wave mixing with rubidium $85$Rb. We demonstrate a maximum intensity difference squeezing of -2.7 dB with a pump power of 285 mW and an output power of 12 mW for each beam. The operation close to the atomic resonances of alkali atoms allows a natural integration into quantum networks.
  arXiv  Detail & Related papers  (2020-04-03T14:29:49Z)
• Quantum-Clustered Two-Photon Walks [68.8204255655161]
  We demonstrate a previously unknown two-photon effect in a discrete-time quantum walk. Two identical bosons with no mutual interactions can remain clustered together. The two photons move in the same direction at each step due to a two-photon quantum interference phenomenon.
  arXiv  Detail & Related papers  (2020-03-12T17:02:35Z)

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.