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A: Fachverband Atomphysik

A 14: Ultracold Atoms, Ions and Molecules III (with Q)

A 14.1: Vortrag

Dienstag, 1. März 2016, 11:00–11:15, f342

Towards an optical phase shift based on Rydberg blockade — •Daniel Tiarks, Steffen Schmidt, Stephan Dürr, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, 85748 Garching, Deutschland

Controlling the interaction between single photons is important for many quantum information technologies. Recently we demonstrated [1,2,3] that an opaque medium in which single photons are converted into stationary Rydberg excitations can be used to control the transmission of a subsequent light pulse by using electromagnetically induced transparency. Manipulation of coherent superpositions requires, however, non-dissipative interactions that only affect the phase of the light.

In this work we report on our recent progress towards realizing controlled phase shifts of single photons extending the work of [4,5]. We store photons in highly exited Rydberg states which change the refractive properties of the medium due to Rydberg blockade. A subsequent light pulse will thus experience a significant phase shift.

[1] S. Baur et al., PRL 112, 073901 (2014)

[2] D. Tiarks et al., PRL 113, 053602 (2014)

[3] H. Gorniaczyk et al., PRL 113, 053601 (2014)

[4] O. Firstenberg et al., Nature 502, 71 (2013)

[5] A. Feizpour et al., Nature Physics 11, 905 (2015)