TY - JOUR T1 - Dissipation induced dipole blockade and anti-blockade in driven Rydberg systems JF - Phys. Rev. A Y1 - 2018 A1 - Jeremy T. Young A1 - Thomas Boulier A1 - Eric Magnan A1 - Elizabeth A. Goldschmidt A1 - Ryan M. Wilson A1 - Steven L. Rolston A1 - James V. Porto A1 - Alexey V. Gorshkov AB -

We study theoretically and experimentally the competing blockade and antiblockade effects induced by spontaneously generated contaminant Rydberg atoms in driven Rydberg systems. These contaminant atoms provide a source of strong dipole-dipole interactions and play a crucial role in the system's behavior. We study this problem theoretically using two different approaches. The first is a cumulant expansion approximation, in which we ignore third-order and higher connected correlations. Using this approach for the case of resonant drive, a many-body blockade radius picture arises, and we find qualitative agreement with previous experimental results. We further predict that as the atomic density is increased, the Rydberg population's dependence on Rabi frequency will transition from quadratic to linear dependence at lower Rabi frequencies. We study this behavior experimentally by observing this crossover at two different atomic densities. We confirm that the larger density system has a smaller crossover Rabi frequency than the smaller density system. The second theoretical approach is a set of phenomenological inhomogeneous rate equations. We compare the results of our rate-equation model to the experimental observations [E. A. Goldschmidt et al.Phys. Rev. Lett. 116, 113001 (2016)] and find that these rate equations provide quantitatively good scaling behavior of the steady-state Rydberg population for both resonant and off-resonant drives.

VL - 97 U4 - 023424 UR - https://link.aps.org/doi/10.1103/PhysRevA.97.023424 U5 - 10.1103/PhysRevA.97.023424 ER -