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A: Fachverband Atomphysik

A 28: Poster Session - Atomic Physics IV

A 28.21: Poster

Donnerstag, 12. März 2020, 16:00–18:00, Empore Lichthof

Number squeezing transfer from spin to momentum states — •Alexander Idel¹, Fabian Anders¹, Polina Feldmann², Bernd Meyer¹, Jan Peise¹, Luis Santos², and Carsten Klempt¹ — ¹Institut für Quantenoptik, Leibniz Universität Hannover — ²Institut für theoretische Physik, Leibniz Universität Hannover

Twin-Fock states can measure the phase of an interferometer more precise than the standard quantum limit (SQL)[1]. Future large-scale atomic gravimeters will employ Bose-Einstein condensed samples due to their well-controlled spatial mode and the low expansion rates. Entangled states such as Twin-Fock states can be used to overcome the SQL in these interferometers. Atomic entangled states are commonly produced in the spin degree of freedom and concepts for their transfer to momentum states have not been demonstrated so far. We apply Raman laser pulses to couple the internal spin state to external momentum states. I will show first results on the entanglement verification and a possible extension of the concept to atomic gravimetry beyond the SQL.

[1] B. Lücke et al, Science, 334, 6057 (2011).