Excitation spectra of strongly correlated lattice bosons and polaritons

  title={Excitation spectra of strongly correlated lattice bosons and polaritons},
  author={Peter Pippan and Hans Gerd Evertz and Martin Hohenadler},
  journal={Physical Review A},
Spectral properties of the Bose-Hubbard model and a recently proposed coupled-cavity model are studied by means of quantum Monte Carlo simulations in one dimension. Both models exhibit a quantum phase transition from a Mott insulator to a superfluid phase. The dynamic structure factor $S(k,\ensuremath{\omega})$ and the single-particle spectrum $A(k,\ensuremath{\omega})$ are calculated, focusing on the parameter region around the phase transition from the Mott insulator with density one to the… 

Fermionized photons in the ground state of one-dimensional coupled cavities

The Density Matrix Renormalization Group algorithm is used to characterize the ground states of one-dimensional coupled cavities in the regime of low photon densities. Numerical results for photon

Dynamical mean-field theory for the Bose-Hubbard model

The dynamical mean field theory (DMFT), which is successful in the study of strongly correlated fermions, was recently extended to boson systems [Phys. Rev. B {\textbf 77}, 235106 (2008)]. In this

From the Jaynes–Cummings–Hubbard to the Dicke model

We discuss the Jaynes–Cummings–Hubbard model describing the superfluid–Mott insulator transition of polaritons (i.e., dressed photon–qubit states) in coupled qubit–cavity arrays in the crossover from

Dynamic density-density correlations in interacting Bose gases on optical lattices

In order to identify possible experimental signatures of the superfluid to Mott-insulator quantum phase transition we calculate the charge structure factor S(k, ω) for the one-dimensional

Characterization of Mott-insulating and superfluid phases in the one-dimensional Bose-Hubbard model

We use strong-coupling perturbation theory, the variational cluster approach (VCA), and the dynamical density-matrix renormalization group (DDMRG) method to investigate static and dynamical

Quantum phase transition and excitations of the Tavis-Cummings lattice model

The enormous progress in controlling quantum optical and atomic systems has prompted ideas for new experimental realizations of strongly correlated many-body systems operating with light. These

Quantum Phase Transitions in the Bose Hubbard Model and in a Bose-Fermi Mixture

Ultracold atomic gases may be the ultimate quantum simulator. These isolated systems have the lowest temperatures in the observable universe, and their properties and interactions can be precisely

Strongly Correlated Polaritons in Nonlinear Cavity Arrays

Arrays of coupled QED cavities have been proposed as promising candidates to study hybrid many-body states of light and matter in a controlled way. The rich scenario emerging in these systems stems



Excitations in a Bose-condensed Liquid

Preface 1. Excitations in superfluid 4He: an introduction 2. Dynamic response of helium atoms to thermal neutrons 3. Bose broken symmetry and its implications 4. High momentum scattering and the

Menotti and N . Trivedi

  • Phys . Rev . B

* Present address: OSRAM Opto Semiconductors, 93055 Regensburg

    B : Quantum Semiclass

    • Phys . Rev . A
    • 2009