Interactions Between Rydberg-Dressed Atoms

Details Interactions Between Rydberg-Dressed Atoms Interactions Between Rydberg-Dressed Atoms

2010-06-16

arxiv.org/abs/1006.3212v2

Physics

Atomic Physics

5 pages, 7 figures; Accepted to Phys. Rev. A, 18 Aug. 2010

Scientific paper

We examine interactions between atoms continuously and coherently driven between the ground state and a Rydberg state, producing "Rydberg-dressed atoms." Because of the large dipolar coupling between two Rydberg atoms, a small admixture of Rydberg character into a ground state can produce an atom with a dipole moment of a few Debye, the appropriate size to observe interesting dipolar physics effects in cold atom systems. We have calculated the interaction energies for atoms that interact via the dipole-dipole interaction and find that due to blockade effects, the R-dependent two-atom interaction terms are limited in size, and can be R-independent up until the dipolar energy is equal to the detuning. This produces R-dependent interactions different from the expected 1/R^3 dipolar form, which have no direct analogy in condensed matter physics, and could lead to new quantum phases in trapped Rydberg systems.

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