Photon Counting as a Probe of Superfluidity in a Two-Band Bose Hubbard System Coupled to a Cavity Field
arXiv:1211.6084 · doi:10.1103/PhysRevLett.111.243603
Abstract
We show that photon number measurement can be used to detect superfluidity for a two-band Bose-Hubbard model coupled to a cavity field. The atom-photon coupling induces transitions between the two internal atomic levels and results in entangled polaritonic states. In the presence of a cavity field, we find different photon numbers in the Mott-insulating versus superfluid phases, providing a method of distinguishing the atomic phases by photon counting. Furthermore, we examine the dynamics of the photon field after a rapid quench to zero atomic hopping by increasing the well depth. We find a robust correlation between the field's quench dynamics and the initial superfluid order parameter, thereby providing a novel and accurate method of determining the order parameter.
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
- Probing quantum phases of ultracold atoms in optical lattices by transmission spectra in cavity QED
- Light scattering from ultracold atoms in optical lattices as an optical probe of quantum statistics
- Polaritons and Pairing Phenomena in Bose--Hubbard Mixtures
- Quantum Phases of Ultracold Bosonic Atoms in two Bands of an Optical-Lattice coupled by a Cavity Field