Hamiltonian Design in Atom-Light Interactions with Rubidium Ensembles: A Quantum Information Toolbox

Details Hamiltonian Design in Atom-Light Interactions with Rubidium Ensembles: A Quantum Information Toolbox Hamiltonian Design in Atom-Light Interactions with Rubidium Ensembles: A Quantum Information Toolbox

2007-12-03

arxiv.org/abs/0712.0256v2

Phys. Rev. A 77, 032316 (2008)

Physics

Quantum Physics

6 pages, 4 figures; added references

Scientific paper

10.1103/PhysRevA.77.032316

We study the coupling between collective variables of atomic spin and light polarization in an ensemble of cold 87Rb probed with polarized light. The effects of multiple hyperfine levels manifest themselves as a rank-2 tensor polarizability, whose irreducible components can be selected by means of probe detuning. The D1 and D2 lines of Rb are explored and we identify different detunings which lead to Hamiltonians with different symmetries for rotations. As possible applications of these Hamiltonians, we describe schemes for spin squeezing, quantum cloning, quantum memory, and measuring atom number.

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