Twisted light drives chiral excitations of interacting electrons in nanostructures with magnetic field

• URL: http://arxiv.org/abs/2508.18480v1
• Date: Mon, 25 Aug 2025 20:44:58 GMT
• Title: Twisted light drives chiral excitations of interacting electrons in nanostructures with magnetic field
• Authors: F. J. Rodríguez, L. Quiroga, N. F. Johnson,
• Abstract summary: Twisted light (TL) provides a powerful tool for driving symmetry resolved transitions in quantum confined nanostructures.<n>We study a realistic model where a TL pulse excites two interacting electrons in a nanostructure under a perpendicular magnetic field.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Twisted light (TL), a special kind of light carrying orbital angular momentum, provides a powerful tool for driving symmetry resolved transitions in quantum confined nanostructures. We study a realistic model where a TL pulse excites two interacting electrons in a nanostructure under a perpendicular magnetic field. To include image charge effects in layered systems, we use an effective electron electron potential of the form 1/r^n. For n = 2, the system exhibits an underlying su(1,1) dynamical symmetry, enabling analytical solutions and a clear interpretation of selection rules, parity changes, and angular momentum resolved absorption. We show that the bare Coulomb 1/r interaction produces similar spectra, indicating that twisted light driven excitations are robust against the precise interaction form. The excitation spectrum reveals strong chiral properties: TL pulses, unlike conventional dipolar fields, directly access interaction-driven transitions otherwise symmetry-forbidden. In particular, TL breaks the generalized Kohn theorem, exposing internal excitations through multi quanta orbital processes. More broadly, our results establish TL as a sensitive probe of correlations, symmetry, and magneto-optical dynamics in strongly interacting quantum systems, uncovering features that remain invisible to standard infrared absorption.

Related papers

• Electron Orbital Angular Momentum Polarization in Neutral Atoms [3.902650840153601]
  We show that in a helium atom, the absorption probability asymmetry between mj=-1 and mj = 1 in the 1s2p state can be precisely controlled.<n>This approach has significant implications across various fields, including quantum computing, quantum communication, and spintronics.
  arXiv  Detail & Related papers  (2025-07-03T10:02:16Z)
• Engineered Chirality of One-Dimensional Nanowires [4.742859282764092]
  The origin and function of chirality in DNA, proteins, and other building blocks of life represent a central question in biology.<n>We use reconfigurable nanoscale control over conductivity at the LaAlO$_3$/SrTiO$_3$ interface to create chiral electron potentials that explicitly lack mirror symmetry.<n>We interpret resonances as arising from an engineered axial spin-orbit interaction within the chiral region.
  arXiv  Detail & Related papers  (2025-02-08T19:14:00Z)
• AC-Stark Spectroscopy of Interactions between Moiré Excitons and Polarons [0.0]
  We use nonlinear pump-probe spectroscopy to study optical excitations in a charge-tunable MoSe$$WS$$ moir'e heterostructure.<n>By measuring the resulting ac Stark effect with a weak resonant laser pulse, we gain access to the nature and mutual interactions of the elementary optical excitations.
  arXiv  Detail & Related papers  (2024-02-26T15:02:51Z)
• Spin Current Density Functional Theory of the Quantum Spin-Hall Phase [59.50307752165016]
  We apply the spin current density functional theory to the quantum spin-Hall phase. We show that the explicit account of spin currents in the electron-electron potential of the SCDFT is key to the appearance of a Dirac cone.
  arXiv  Detail & Related papers  (2022-08-29T20:46:26Z)
• Formation of robust bound states of interacting microwave photons [148.37607455646454]
  One of the hallmarks of interacting systems is the formation of multi-particle bound states. We develop a high fidelity parameterizable fSim gate that implements the periodic quantum circuit of the spin-1/2 XXZ model. By placing microwave photons in adjacent qubit sites, we study the propagation of these excitations and observe their bound nature for up to 5 photons.
  arXiv  Detail & Related papers  (2022-06-10T17:52:29Z)
• Relativistic aspects of orbital and magnetic anisotropies in the chemical bonding and structure of lanthanide molecules [60.17174832243075]
  We study the electronic and ro-vibrational states of heavy homonuclear lanthanide Er2 and Tm2 molecules by applying state-of-the-art relativistic methods. We were able to obtain reliable spin-orbit and correlation-induced splittings between the 91 Er2 and 36 Tm2 electronic potentials dissociating to two ground-state atoms.
  arXiv  Detail & Related papers  (2021-07-06T15:34:00Z)
• Strong electron-electron interactions in Si/SiGe quantum dots [0.0]
  We study two-electron wavefunctions in electrostatically confined quantum dots formed in a SiGe/Si/SiGe quantum well at zero magnetic field. Our calculations show that strong electron-electron interactions, induced by weak confinement, can significantly suppress the low-lying, singlet-triplet excitation energy. These results have important implications for the rational design and fabrication of quantum dot qubits with predictable properties.
  arXiv  Detail & Related papers  (2021-05-22T06:12:39Z)
• Molecular Interactions Induced by a Static Electric Field in Quantum Mechanics and Quantum Electrodynamics [68.98428372162448]
  We study the interaction between two neutral atoms or molecules subject to a uniform static electric field. Our focus is to understand the interplay between leading contributions to field-induced electrostatics/polarization and dispersion interactions.
  arXiv  Detail & Related papers  (2021-03-30T14:45:30Z)
• Universal pair-polaritons in a strongly interacting Fermi gas [0.0]
  We report on experiments using molecular transitions in a strongly interacting Fermi gas, directly coupling cavity photons to pairs of atoms. The dependence of the pair-polariton spectrum on interatomic interactions is universal, independent of the transition used. This represents a magnification of many-body effects by two orders of magnitude in energy.
  arXiv  Detail & Related papers  (2021-03-03T15:06:06Z)
• Effects of the dynamical magnetization state on spin transfer [68.8204255655161]
  We show that the complex interactions between the spin-polarized electrons and the dynamical states of the local spins can be decomposed into separate processes. Our results suggest that exquisite control of spin transfer efficiency and of the resulting dynamical magnetization states may be achievable.
  arXiv  Detail & Related papers  (2021-01-21T22:12:03Z)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)

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.