Emergent criticality and universality class of the finite temperature charge density wave transition in lattice Bose gases within optical cavities

Abstract

We investigate the finite temperature charge density wave (CDW) transition of lattice Bose gases within optical cavities in the deep Mott-insulator limit. We find a new critical regime emerges at a temperature around one-half of the on-site interaction energy, where the first order CDW transition at low temperatures terminates at a critical point and changes to a second order one. By directly calculating the critical exponents and constructing the effective theory in the corresponding critical regime, we find the emergent criticality belongs to the five-dimensional Ising universality class. Direct experimental observation of the emergent criticality can be readily performed by current experimental set-ups operated in the temperature regime around half the on-site interaction energy.

7 pages, 3 figures

References in corpus (8)

• A High Phase-Space-Density Gas of Polar Molecules
• Cold atoms in cavity-generated dynamical optical potentials
• Observation of dipole-dipole interaction in a degenerate quantum gas
• Roton-type mode softening in a quantum gas with cavity-mediated long-range interactions
• Rydberg excitation of Bose-Einstein condensates
• Bose-glass phases of ultracold atoms due to cavity backaction
• Lattice bosons with infinite range checkerboard interactions
• Spectral properties and phase diagram of correlated lattice bosons in an optical cavity within the B-DMFT

Cited by in corpus (2)

• Temporal bistability in the dissipative Dicke-Bose-Hubbard system
• Finite temperature mean-field theory with intrinsic non-hermitian structures for Bose gases in optical lattices