51 citations · 124 across the 5 of their papers we have counts for
5 papers
Realization of a Rydberg-dressed Ramsey interferometer and electrometer
A. Arias, G. Lochead, T. M. Wintermantel +2
We present the experimental realization and characterization of a Ramsey interferometer based on optically trapped ultracold potassium atoms, where one state is continuously couple…
A versatile, high-power 460nm laser system for Rydberg excitation of ultracold potassium
Alda Arias, Stephan Helmrich, Christoph Schweiger +3
We present a versatile laser system which provides more than 1.5W of narrowband light, tunable in the range from 455-463 nm. It consists of a commercial Titanium-Sapphire laser whi…
Uncovering the non-equilibrium phase structure of an open quantum spin system
S. Helmrich, A. Arias, S. Whitlock
We experimentally and theoretically investigate the non-equilibrium phase structure of a well-controlled driven-disspative quantum spin system governed by the interplay of coherent…
Two-body interactions and decay of three-level Rydberg-dressed atoms
S. Helmrich, A. Arias, N. Pehoviak +1
We theoretically analyze the interactions and decay rates for atoms dressed by multiple laser fields to strongly interacting Rydberg states using a quantum master equation approach…
Coupling highly excited nuclei to the atomic shell in dense astrophysical plasmas
Stephan Helmrich, Katja Spenneberg, Adriana Pálffy
In dense astrophysical plasmas, neutron capture populates highly excited nuclear states close to the neutron threshold. The impact of additional low-energy nuclear excitations via…