2015/08/28 by Philipp Werner, Martin Eckstein
Materials Science · Physics and Astronomy · #Boson #Charge (physics) #Cold Atom Physics and Bose-Einstein Condensates #Coupling (piping) #Field (mathematics) #Hubbard model #Non-equilibrium thermodynamics #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Polaron #Relaxation (psychology) #cond-mat.str-el
paper · pdf · doi:10.1063/1.4935245
published as Struct. Dyn. 3, 023603 (2016)
arxiv created 2015/08/28 · openalex publication_date 2015/11/09 · arxiv updated 2015/11/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Hirsch's dynamic Hubbard model describes the effect of orbital expansion with occupancy by coupling the doublon operator to an auxiliary boson. In the Mott insulating phase, empty sites (holes) and doubly occupied orbitals (doublons) become charge carriers on top of the half-filled background. We use the nonequilibrium dynamical mean field method to study the properties of photo-doped doublons and holes in this model in the strongly correlated regime. In particular, we discuss how photodoping leads to doublon and hole populations with different effective temperatures, and we analyze the relaxation behavior as a function of the boson coupling and boson energy. In the polaronic regime, the nontrivial energy exchange between doublons, holes, and bosons can result in a negative temperature distribution for the holes.