The tuning of para- and diamagnetic cavity photon excitations in a square array of quantum dots in a magnetic field
arXiv:2409.09936 · doi:10.1103/PhysRevB.110.205301
Abstract
We employ a ``real-time'' excitation scheme to calculate the excitation spectra of a two-dimensional electron system in a square array of quantum dots placed in a circular cylindrical far-infrared photon cavity subjected to a perpendicular homogeneous external magnetic field. The Coulomb interaction of the electrons is handled via spin density functional theory and the para- and the diamagnetic parts of the electron-photon coupling are updated according to a configuration interaction method in each iteration of the density functional calculation. The results show that an excitation scheme built on using the symmetry of the lateral square superlattice of the dots and the cylindrical cavity produces both para- and diamagnetic resonance peaks with oscillator strengths that can be steered by the excitation pulse parameters. The excitation method breaks the conditions for the generalized Kohn theorem and allows for insight into the subband structure of the electron system and can be used both in and outside the linear response regime.
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References in corpus (20)
- Octopus, a computational framework for exploring light-driven phenomena and quantum dynamics in extended and finite systems
- Quantum Electrodynamical Density-Functional Theory: Bridging Quantum Optics and Electronic-Structure Theory
- Cavity Quantum Materials
- Collective, Coherent, and Ultrastrong Coupling of 2D Electrons with Terahertz Cavity Photons
- Cavity Born-Oppenheimer Approximation for Correlated Electron-Nuclear-Photon Systems
- Kohn-Sham Approach to Quantum Electrodynamical Density Functional Theory: Exact Time-Dependent Effective Potentials in Real Space
- Interaction-induced shift of the cyclotron resonance of graphene using infrared spectroscopy
- Coherent cyclotron motion beyond Kohn's theorem
- Effects of screening on the Hofstadter butterfly
- Simple Exchange-Correlation Energy Functionals for Strongly Coupled Light-Matter Systems based on the Fluctuation-Dissipation Theorem
- Real-Space, Real-Time Approach to Quantum-Electrodynamical Time-Dependent Density Functional Theory
- Magnetic Bloch Theorem and Reentrant Flat Bands in Twisted Bilayer Graphene at Flux
- Spin Ensemble Density Functional Theory for Inhomogeneous Quantum Hall Systems
- Magnetization in short-period mesoscopic electron systems
- Persistent Currents and Magnetization in two-dimensional Magnetic Quantum Systems
- Unified approach to cyclotron and plasmon resonances in a periodic 2DEG hosting the Hofstadter butterfly
- The effects of a far-infrared photon cavity field on the magnetization of a square quantum dot array
- Controlling the excitation spectrum of a quantum dot array with a photon cavity
- Impurity and spin effects on the magneto-spectroscopy of a THz-modulated nanostructure
- Magneto-optical properties of a quantum dot array interacting with a far-infrared photon mode of a cylindrical cavity