Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 19: Quantum Optics II

Q 19.7: Talk

Tuesday, March 10, 2020, 15:45–16:00, f342

Transferring entanglement from the spin domain to distinct momentum states — •Fabian Anders, Alexander Idel, Bernd Meyer, and Carsten Klempt — Institut für Quantenoptik, Leibniz Universität Hannover

Many-particle entangled states are commonly prepared in the spin degree of freedom of cold atoms. Within the spin domain entangled states such as the twin-Fock state allow for enhancement of Ramsey measurements beyond the standard quantum limit (SQL). For the application in atom interferometry, however, entanglement between distinct momentum states is needed. We adiabatically prepare twin-Fock states in two spin levels of a spinor Bose-Einstein condensate. By applying a Raman laser coupling we transfer one of the two spin levels to a finite momentum state. I will show first results on the verification of entanglement and present a scheme that allows for gravimetry beyond the SQL.