TY - JOUR T1 - Tunable three-body loss in a nonlinear Rydberg medium JF - Phys. Rev. Lett., in press Y1 - 2021 A1 - Dalia P. Ornelas Huerta A1 - Przemyslaw Bienias A1 - Alexander N. Craddock A1 - Michael Gullans A1 - Andrew J. Hachtel A1 - Marcin Kalinowski A1 - Mary E. Lyon A1 - Alexey V. Gorshkov A1 - Steven L. Rolston A1 - J. V. Porto AB -

Long-range Rydberg interactions, in combination with electromagnetically induced transparency (EIT), give rise to strongly interacting photons where the strength, sign, and form of the interactions are widely tunable and controllable. Such control can be applied to both coherent and dissipative interactions, which provides the potential to generate novel few-photon states. Recently it has been shown that Rydberg-EIT is a rare system in which three-body interactions can be as strong or stronger than two-body interactions. In this work, we study a three-body scattering loss for Rydberg-EIT in a wide regime of single and two-photon detunings. Our numerical simulations of the full three-body wavefunction and analytical estimates based on Fermi's Golden Rule strongly suggest that the observed features in the outgoing photonic correlations are caused by the resonant enhancement of the three-body losses.

UR - https://arxiv.org/abs/2009.13599 ER - TY - JOUR T1 - On-demand indistinguishable single photons from an efficient and pure source based on a Rydberg ensemble Y1 - 2020 A1 - Dalia P. Ornelas-Huerta A1 - Alexander N. Craddock A1 - Elizabeth A. Goldschmidt A1 - Andrew J. Hachtel A1 - Yidan Wang A1 - P. Bienias A1 - Alexey V. Gorshkov A1 - Steve L. Rolston A1 - James V. Porto AB -

Single photons coupled to atomic systems have shown to be a promising platform for developing quantum technologies. Yet a bright on-demand, highly pure and highly indistinguishable single-photon source compatible with atomic platforms is lacking. In this work, we demonstrate such a source based on a strongly interacting Rydberg system. The large optical nonlinearities in a blockaded Rydberg ensemble convert coherent light into a single-collective excitation that can be coherently retrieved as a quantum field. We observe a single-transverse-mode efficiency up to 0.18(2), g(2)=2.0(1.5)×10−4, and indistinguishability of 0.982(7), making this system promising for scalable quantum information applications. Accounting for losses, we infer a generation probability up to 0.40(4). Furthermore, we investigate the effects of contaminant Rydberg excitations on the source efficiency. Finally, we introduce metrics to benchmark the performance of on-demand single-photon sources. 

UR - https://arxiv.org/abs/2003.02202 ER -