Noninteger high-harmonic generation from extended correlated systems

• URL: http://arxiv.org/abs/2403.08327v1
• Date: Wed, 13 Mar 2024 08:24:53 GMT
• Title: Noninteger high-harmonic generation from extended correlated systems
• Authors: Christian Saugbjerg Lange, Thomas Hansen, Lars Bojer Madsen,
• Abstract summary: We use the Fermi-Hubbard model to study HHG from a linear chain of atoms. The presence of signal at noninteger harmonics can be interpreted as originating from the population of multiple Floquet states.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The spectra produced by high-harmonic generation (HHG) typically exhibit well-defined peaks at odd integers times the laser frequency. However, in recent investigations of HHG from correlated materials, spectra exhibit signals at noninteger harmonics which do not conform to the well-known symmetry-based selection rules for HHG-spectra. Here, we use the Fermi-Hubbard model to study HHG from a linear chain of atoms. This model allows us to study both the correlated and uncorrelated phases through a specification of the amount of onsite electron-electron repulsion. The presence of signal at noninteger harmonics can be interpreted as originating from the population of multiple Floquet states. We show how this coupling to different Floquet states depends on the characteristics of the driving pulse and the strength of the electron-electron interaction in the system.

Related papers

• Electron-correlation induced nonclassicallity of light from high-harmonic generation [0.0]
  We study the effect of electron-electron correlations on the quantum state of the light emitted from high-harmonic generation (HHG) We analytically find that the emitted light is in a classical coherent state. In the Mott-insulating phase, a consideration of the photon statistics and squeezing of the emitted photonic state shows that the inter-Hubbard-subband current generates nonclassical light.
  arXiv  Detail & Related papers  (2023-12-14T13:49:59Z)
• Fragmented superconductivity in the Hubbard model as solitons in Ginzburg-Landau theory [58.720142291102135]
  Superconductivity and charge density waves are observed in close vicinity in strongly correlated materials. We investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary $t$-$tprime$-$U$ Hubbard model. We provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation.
  arXiv  Detail & Related papers  (2023-07-21T18:00:07Z)
• Resonant Parametric Photon Generation in Waveguide-coupled Quantum Emitter Arrays [83.88591755871734]
  We have developed a theory of parametric photon generation in the waveguides coupled to arrays of quantum emitters with temporally modulated resonance frequencies. Such generation can be interpreted as a dynamical Casimir effect. We demonstrate numerically and analytically how the emission directionality and photon-photon correlations can be controlled by the phases of the modulation.
  arXiv  Detail & Related papers  (2023-02-24T18:07:49Z)
• 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)
• Degenerate parametric down-conversion facilitated by exciton-plasmon polariton states in nonlinear plasmonic cavity [0.0]
  We study the effect of degenerate parametric down-conversion (DPDC) in an ensemble of two-level quantum emitters (QEs) coupled via near-field interactions to a single surface plasmon (SP) mode of a nonlinear plasmonic cavity. Considering the strong coupling regime, we find a critical SP-QE coupling attributed to the phase transition between normal and lasing steady states. Examining fluctuations above the system's steady states, we predict new elementary excitations, namely, the exciton-plasmon polaritons formed by the two-SP quanta and single-ex
  arXiv  Detail & Related papers  (2022-08-08T06:07:54Z)
• Quantum Coherence Tomography of Lightwave Controlled Superconductivity [0.06364409691582436]
  Lightwave periodic driving of nearly dissipation-less currents has recently emerged as a universal control concept for superconducting (SC) and topological electronics applications. We report the discovery of lightwave-controlled superconductivity via parametric time-periodic driving of strongly-coupled bands in iron-based superconductors. We are able to measure non-perturbative, high-order correlations in this strongly-driven superconductivity by separating the THz multi-dimensional coherent spectra into conventional pump-probe, Higgs collective mode, and pronounced bi-Higgs frequency sideband peaks with highly nonlinear field dependence.
  arXiv  Detail & Related papers  (2022-07-13T04:31:34Z)
• In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator [68.8204255655161]
  Periodically driven quantum many-body systems host unconventional behavior not realized at equilibrium. We investigate such a setup for strongly interacting spinless fermions on a chain, which at zero temperature and strong interactions form a charge density wave insulator.
  arXiv  Detail & Related papers  (2022-05-19T13:28:47Z)
• High Harmonic Generation from Isolated Bound States: Tunable Emission Spectra and Mollow Triplets [0.0]
  We show that a strong nonlinear response of certain systems can split the HHG spectrum into non-harmonic Mollow-type triplets. The spectral lines become tunable by the driver field. These phenomena are universal to any material system with isolated bound states.
  arXiv  Detail & Related papers  (2022-02-11T17:57:09Z)
• Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
  We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
  arXiv  Detail & Related papers  (2021-03-15T21:38:41Z)
• Frequency-resolved photon correlations in cavity optomechanics [58.720142291102135]
  We analyze the frequency-resolved correlations of the photons being emitted from an optomechanical system. We discuss how the time-delayed correlations can reveal information about the dynamics of the system. This enriched understanding of the system can trigger new experiments to probe nonlinear phenomena in optomechanics.
  arXiv  Detail & Related papers  (2020-09-14T06:17:36Z)
• Non-Markovian resonance fluorescence [16.23384426494197]
  We apply linear-response theory to describe the dynamics of a detector monitoring the emission spectrum of a general multi-level system. The resultant emission lineshape function is directly related to the two-time correlation of system observables.
  arXiv  Detail & Related papers  (2020-03-30T11:41:07Z)

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.