Bright and dark excitons in an atom--pair filled optical lattice within a cavity

Abstract

We study electronic excitations of a degenerate gas of atoms trapped in pairs in an optical lattice. Local dipole-dipole interactions produce a long lived antisymmetric and a short lived symmetric superposition of individual atomic excitations as the lowest internal on-site excitations. Due to the much larger dipole moment the symmetric states couple efficiently to neighbouring lattice sites and can be well represented by Frenkel excitons, while the antisymmetric dark states stay localized. Within a cavity only symmetric states couple to cavity photons inducing long range interactions to form polaritons. We calculate their dispersion curves as well as cavity transmission and reflection spectra to observe them. For a lattice with aspherical sites bright and dark states get mixed and their relative excitation energies depend on photon polarizations. The system should allow to study new types of solid state phenomena in atom filled optical lattices.

References in corpus (6)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Strong atom-field coupling for Bose-Einstein condensates in an optical cavity on a chip
• Cavity QED with a Bose-Einstein condensate
• Cavity-enhanced superradiant Rayleigh scattering with ultra-cold and Bose-Einstein condensed atoms
• Excitons and cavity polaritons for ultracold atoms in an optical lattice
• Exciton-Polariton scattering for defect detection in cold atom Optical Lattices

Cited by in corpus (9)

• Hybrid Quantum System of a Nanofiber Mode Coupled to Two Chains of Optically Trapped Atoms
• Superradiant and Dark Exciton States in an Optical Lattice within a Cavity
• Quantum Phases of Ultracold Bosonic Atoms in two Bands of an Optical-Lattice coupled by a Cavity Field
• Collective Light Emission of a Finite Size Atomic Chain
• Optical Properties of Concentric Nanorings of Quantum Emitters
• Coupling of Electronic and Motional Dynamics in a Cold Atom Optical Lattice
• Polarization-Mixing in Optical Lattices with Uniaxial Anisotropy
• Coupling of polaritons to vibrational modes of ultracold atoms in an optical lattice
• Dark Bogolon-Excitons in a Linear Atomic Super-Lattice