Scientific Results

Reading the phase of a Raman excitation with a multi-state atomic interferometer

Year: 2014

Authors: Lombardi P., Schaefer F., Herrera I., Cherukattil S., Petrovic J., Lovecchio C., Marin F., Cataliotti F.S.

Autors Affiliation: European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara 1, 50019 Sesto F.no (FI), Italy; Vinca Institute of Nuclear Sciences, PO Box 522, 11001 Belgrade, Serbia; Dipartimento di Fisica, Astronomia Università di Firenze, via Sansone 1, 50019 Sesto F.no (FI), Italy; CNR-INO, L.go E. Fermi 2, 50125 Firenze, Italy

Abstract: Atomic memories for flying photonic qubits are an essential ingredient for many applications like e.g. quantum repeaters. Verification of the coherent transfer of information from a light field to an atomic superposition is usually obtained using an optical read-out. In this paper we report the direct detection of the atomic coherence by means of atom interferometry. We experimentally verified both that a bichromatic laser field closing a Raman transition imprints a distinct, controllable phase on the atomic coherence and that it can be recovered after a variable time delay.

Journal/Review: OPTICS EXPRESS

Volume: 22 (16)      Pages from: 19141  to: 19148

More Information: This work was supported by the Seventh Framework Programme for Research of the European Comission, under FET-Open grant MALICIA (265522) and by MIUR under FIRB \”Futuro in Ricerca\” project HYTEQ and MAE under bilateral Serbia-Italy project M01049. P.L. and F.M. acknowledge support from ERA-NET CHIST-ERA (QScale). J.P. acknowledges support from the Ministry of Education, Science and Technological Development of Serbia, Project III 45010 and from LASERLAB-EUROPE (284464, EC FP7). We thank M. Inguscio for fruitful discussions and continuous support. We wish to thank M. Schrambock (Atominstitut, TU-Wien) at the ZMNS (TU-Wien) for the realization of the atom chip.
KeyWords: Optical constants; Optics, Atom interferometry; Atomic coherence; Atomic interferometers; Bichromatic laser fields; Coherent transfer; Quantum repeaters; Raman excitation; Variable time delay, Atoms
DOI: 10.1364/OE.22.019141

Citations: 5
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