Probing the Superfluid - Mott Insulating Shell Structure of Cold Atoms by Parametric Excitations

Abstract

We study the effect of parametric excitations on systems of confined ultracold Bose atoms in periodically modulated optical lattices. In the regime where Mott insulating and Superfluid domains coexist, we show that the dependence of the energy absorbed by the system on the frequency of the modulation serves as an experimental probe for the existence and properties of Mott insulating-Superfluid domains.

4 pages, 1 figure

References in corpus (5)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Quantum Monte Carlo simulations of confined bosonic atoms in optical lattices
• Spectroscopy of ultracold atoms by periodic lattice modulations
• Bragg spectroscopy of trapped one dimensional strongly interacting bosons in optical lattices: Probing the cake-structure
• Signatures of the superfluid to Mott-insulator transition in the excitation spectrum of ultracold atoms

Cited by in corpus (7)

• Density correlations and dynamical Casimir emission of Bogoliubov phonons in modulated atomic Bose-Einstein condensates
• Nonequilibrium Quantum Phase Transitions in the Ising Model
• Topological instabilities in ac-driven bosonic systems
• AC-driven Quantum Phase Transition in the Lipkin-Meshkov-Glick Model
• Suppression of Faraday waves in a Bose-Einstein condensate in the presence of an optical lattice
• Parametric resonance and spin-charge separation in 1D fermionic systems
• Parametric amplification of magnetoplasmons in semiconductor quantum dots