Photon Many-body Dispersion: an Exchange-correlation Functional for Strongly Coupled Light-matter Systems

• URL: http://arxiv.org/abs/2404.04765v1
• Date: Sun, 7 Apr 2024 00:35:11 GMT
• Title: Photon Many-body Dispersion: an Exchange-correlation Functional for Strongly Coupled Light-matter Systems
• Authors: Cankut Tasci, Leonardo A. Cunha, Johannes Flick,
• Abstract summary: We introduce an electron-photon exchange-correlation functional for quantum electrodynamical density-functional theory (QEDFT) We show that pMBD accurately captures effects that arise in the context of strong light-matter interactions.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We introduce an electron-photon exchange-correlation functional for quantum electrodynamical density-functional theory (QEDFT). The approach, photon MBD (pMBD), is inspired by the many-body dispersion (MBD) method for weak intermolecular interactions, which is generalized to include both electronic and photonic (electromagnetic) degrees of freedom on the same footing. We demonstrate that pMBD accurately captures effects that arise in the context of strong light-matter interactions, such as anisotropic electron-photon interactions, beyond single-photon effects, and cavity modulated van der Waals interactions. Moreover, we show that pMBD is computationally efficient and allows simulations of large complex systems coupled to optical cavities.

Related papers

• Collective coupling of driven multilevel atoms and its effect on four-wave mixing [0.0]
  We present a systematic analysis of the cooperative effects arising in driven systems composed of multilevel atoms coupled via a common electromagnetic environment. The dependence of single and two-photon correlations are studied in detail for each region by varying atomic orientations. It is found that the anisotropy of the dipole-dipole interaction and its wave nature are essential to understand the behavior of the photons correlations.
  arXiv  Detail & Related papers  (2024-04-04T17:36:24Z)
• Electron-Photon Exchange-Correlation Approximation for QEDFT [0.0]
  Quantum-electrodynamical density-functional theory (QEDFT) provides a promising avenue for exploring complex light-matter interactions. An approximation for the electron-photon exchange-correlation potential is needed. Here we consider this QEDFT functional approximation from one to three-dimensional finite systems.
  arXiv  Detail & Related papers  (2024-02-15T08:50:36Z)
• 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)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Single-photon blockade in quasichiral atom-photon interaction: Simultaneous high purity and high efficiency [1.9165601997790278]
  Single-photon blockade (1PB) in the quasichiral regime of atom-photon interaction mediates via dissipative environment. We find that in the quasichiral regime, the unconventional photon blockade (UPB) always incorporates with the conventional photon blockade (CPB) in the condition of maximum chirality. Our work paves the way for 1PB towards practical applications and reveals the intriguing quantum-optics phenomena in the quasichiral light-matter interaction.
  arXiv  Detail & Related papers  (2021-12-28T17:22:04Z)
• Purcell-enhanced dipolar interactions in nanostructures [0.0]
  Strong light-induced interactions between atoms are known to cause nonlinearities at a few-photon level. Here, we combine the high densities achievable in thermal atomic vapors with an efficient coupling to a slot waveguide. The results pave the way towards a robust scalable platform for quantum nonlinear optics and all-optical quantum information processing at room temperature.
  arXiv  Detail & Related papers  (2021-12-21T13:11:59Z)
• Stochastic Variational Approach to Small Atoms and Molecules Coupled to Quantum Field Modes [55.41644538483948]
  We present a variational calculation (SVM) of energies and wave functions of few particle systems coupled to quantum fields in cavity QED. Examples for a two-dimensional trion and confined electrons as well as for the He atom and the Hydrogen molecule are presented.
  arXiv  Detail & Related papers  (2021-08-25T13:40:42Z)
• Photon-mediated interactions near a Dirac photonic crystal slab [68.8204255655161]
  We develop a theory of dipole radiation near photonic Dirac points in realistic structures. We find positions where the nature of the collective interactions change from being coherent to dissipative ones. Our results significantly improve the knowledge of Dirac light-matter interfaces.
  arXiv  Detail & Related papers  (2021-07-01T14:21:49Z)
• Waveguide quantum electrodynamics: collective radiance and photon-photon correlations [151.77380156599398]
  Quantum electrodynamics deals with the interaction of photons propagating in a waveguide with localized quantum emitters. We focus on guided photons and ordered arrays, leading to super- and sub-radiant states, bound photon states and quantum correlations with promising quantum information applications.
  arXiv  Detail & Related papers  (2021-03-11T17:49:52Z)
• 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)
• Quantum interface between light and a one-dimensional atomic system [58.720142291102135]
  We investigate optimal conditions for the quantum interface between a signal photon pulse and one-dimensional chain consisting of a varied number of atoms. The efficiency of interaction is mainly limited by achieved overlap and coupling of the waveguide evanescent field with the trapped atoms.
  arXiv  Detail & Related papers  (2020-04-11T11:43:54Z)

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.