Experimental proof of quantum Zeno-assisted noise sensing

Year: 2019

Authors: Do H.-V., Lovecchio C., Mastroserio I., Fabbri N., Cataliotti F. S., Gherardini S., Müller M. M., Dalla Pozza N., Caruso F.

Autors Affiliation: LENS, Via N Carrara 1, I-50019 Sesto Fiorentino, Italy; QSTAR, Via N Carrara 1, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Dipartimento Fis & Astron, Sesto Fiorentino, Italy; Univ Pisa, Dept Energy Syst Terr & Construct Engn, Pisa, Italy; Ist Nazl Ott CNR INO, Florence, Italy; Univ Napoli Federico II, Dipartimento Fis Ettore Pancini, Naples, Italy; Forschungszentrum Julich, Peter Grunberg Inst, Inst Quantum Control, Julich, Germany.

Abstract: In the ideal quantum Zeno (QZ) effect, repeated quantum projective measurements can freeze the coherent dynamics of a quantum system. However, in the weak QZ regime, measurement back- actions can allow the sensing of semi-classical field fluctuations. In this regard, we theoretically show how to combine the controlled manipulation of a quantum two-level system, used as a probe, with a sequence of projective measurements to have direct access to the noise correlation function. We experimentally test the effectiveness of the proposed noise sensing method on a properly engineered Bose–Einstein condensate of 87Rb atoms realized on an atom chip. We believe that our QZ-based approach can open a new path towards novel quantum sensing devices.

Journal/Review: NEW JOURNAL OF PHYSICS

Volume: 21 (11)      Pages from: 113056-1  to: 113056-12

More Information: The author gratefully acknowledges Elisabetta Paladino and Giuseppe Falci for fruitful discussions and comments, and Massimo Inguscio for continuous inspiration and support. H-VD and SG have equally contributed to this work from the experimental and theoretical side, respectively. SG, NDP, and FC were financially supported from the Fondazione CRFirenze through the project Q-BIOSCAN, PATHOS EUH2020 FET-OPEN grant no. 828946, and UNIFI grant Q-CODYCES. MMacknowledges funding from the EC H2020 grant 820394 (ASTERIQS).
KeyWords: stochastic quantum Zeno effect, quantum noise sensing, quantum information, atomic physics
DOI: 10.1088/1367-2630/ab5740

Citations: 24
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