Collective Rydberg excitations of an atomic gas confined in a ring lattice

Details Collective Rydberg excitations of an atomic gas confined in a ring lattice Collective Rydberg excitations of an atomic gas confined in a ring lattice

2008-12-29

arxiv.org/abs/0812.4894v1

Phys. Rev. A 79, 043419 (2009)

Physics

Quantum Physics

10 pages, 11 figures

Scientific paper

We study the excitation dynamics of Rydberg atoms in a one-dimensional lattice with periodic boundary conditions where the atomic Rydberg states are resonantly excited from the electronic ground state. Our description of the corresponding dynamics is numerically exact within the perfect blockade regime, i.e. no two atoms in a given range can be excited. The time-evolution of the mean Rydberg density, density-density correlations as well as entanglement properties are analyzed in detail. We demonstrate that the short time dynamics is universal and dominated by quantum phenomena, while for larger time the characteristics of the lattice become important and the classical features determine the dynamics. The results of the perfect blockade approach are compared to the predictions of an effective Hamiltonian which includes the interaction of two neighboring Rydberg atoms up to second order perturbation theory.

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