Dissipative Quantum Ising model in a cold atomic spin-boson mixture

Abstract

Using cold bosonic atoms with two (hyperfine) ground states, we introduce a spin-boson mixture which allows to implement the quantum Ising model in a tunable dissipative environment. The first specie lies in a deep optical lattice with tightly confining wells and forms a spin array; spin-up/down corresponds to occupation by one/no atom at each site. The second specie forms a superfluid reservoir. Different species are coupled coherently via laser transitions and collisions. Whereas the laser coupling mimics a transverse field for the spins, the coupling to the reservoir sound modes induces a ferromagnetic (Ising) coupling as well as dissipation. This gives rise to an order-disorder quantum phase transition where the effect of dissipation can be studied in a controllable manner.

4 pages, 2 figures, 1 table; Title modified and cosmetic changes

References in corpus (4)

• Phase diagram and critical exponents of a dissipative Ising spin chain in a transverse magnetic field
• Diffraction limited optics for single atom manipulation
• Universal conductance of nanowires near the superconductor-metal quantum transition
• Dynamics, dephasing and clustering of impurity atoms in Bose-Einstein condensates

Cited by in corpus (3)

• Superfluid-Mott Insulator Transition of Light in the Jaynes-Cummings Lattice
• Adiabatic dynamics in open quantum critical many-body systems
• Supersolidity of cold-atom Bose-Fermi mixtures in optical lattices