Stuttgart 2012 – scientific programme

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A: Fachverband Atomphysik

A 49: Ultra-cold plasmas and Rydberg systems

A 49.3: Talk

Friday, March 16, 2012, 14:30–14:45, V57.03

Amplifying single impurities immersed in a gas of ultracold atoms — •Beatriz Olmos¹, Weibin Li¹, Sebastian Hofferberth², and Igor Lesanovsky¹ — ¹Midlands Ultracold Atom Research Centre (MUARC), School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom — ²5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany

We present a method for amplifying a single or scattered impurities immersed in a background gas of ultracold atoms so that they can be optically imaged and spatially resolved. Our approach relies on a Raman transfer between two stable atomic hyperfine states that is conditioned on the presence of an impurity atom. The amplification is based on the strong interaction among atoms excited to Rydberg states. We perform a detailed analytical study of the performance of the proposed scheme with particular emphasis on the influence of inevitable many-body effects.