F
Filippo Levi
Researcher at National Institute of Standards and Technology
Publications - 254
Citations - 5871
Filippo Levi is an academic researcher from National Institute of Standards and Technology. The author has contributed to research in topics: Atomic clock & Frequency standard. The author has an hindex of 34, co-authored 236 publications receiving 4960 citations. Previous affiliations of Filippo Levi include Polytechnic University of Turin & Instituto Politécnico Nacional.
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Journal ArticleDOI
Geodesy and metrology with a transportable optical clock
Jacopo Grotti,Silvio Koller,Stefan Vogt,Sebastian Häfner,Uwe Sterr,Christian Lisdat,Heiner Denker,Christian Voigt,Ludger Timmen,Antoine Rolland,Fred N. Baynes,Helen S. Margolis,Michel Zampaolo,Pierre Thoumany,Marco Pizzocaro,Benjamin Rauf,Filippo Bregolin,Anna Tampellini,Piero Barbieri,Massimo Zucco,Giovanni Antonio Costanzo,Cecilia Clivati,Filippo Levi,Davide Calonico +23 more
TL;DR: The first field measurement campaign with a transportable optical lattice clock was reported in this article, where the authors used it to determine the gravity potential difference between the middle of a mountain and a location 90 km away.
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Single-Atom Optical Clock with High Accuracy
Windell H. Oskay,Scott A. Diddams,Elizabeth A. Donley,Tara M. Fortier,Thomas P. Heavner,Leo W. Hollberg,Wayne M. Itano,Steven R. Jefferts,M. J. Delaney,Kyoungsik Kim,Filippo Levi,Thomas E. Parker,J. C. Bergquist +12 more
TL;DR: A comparison between the cesium fountain standard NIST-F1, which has been evaluated with an inaccuracy of about 4 x 10 (-16), and an optical frequency standard based on an ultraviolet transition in a single, laser-cooled mercury ion for which the fractional systematic frequency uncertainty was below 7.2 x 10(-17).
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Synthetic Dimensions and Spin-Orbit Coupling with an Optical Clock Transition.
Lorenzo Francesco Livi,G. Cappellini,M. Diem,Lorenzo Franchi,Cecilia Clivati,M. Frittelli,Filippo Levi,Davide Calonico,Jacopo Catani,Massimo Inguscio,Leonardo Fallani +10 more
TL;DR: This work has engineered fermionic ladders with synthetic magnetic flux in an experimental configuration that has allowed them to achieve uniform fluxes on a lattice with minimal requirements and unprecedented tunability and opens new directions for the investigation of topological states of matter with ultracold atomic gases.
Journal ArticleDOI
Double-pass acousto-optic modulator system
TL;DR: In this paper, the authors proposed a compact, stable, double-pass AOM with 75% double pass diffraction efficiency and a tuning bandwidth of 68 MHz full width at half maximum for light transmitted through a singlemode fiber.
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Precision atomic spectroscopy for improved limits on variation of the fine structure constant and local position invariance.
Tara M. Fortier,Tara M. Fortier,Neil Ashby,J. C. Bergquist,M. J. Delaney,Scott A. Diddams,Thomas P. Heavner,Leo W. Hollberg,Wayne M. Itano,Steven R. Jefferts,Kyoungsik Kim,Filippo Levi,Luca Lorini,Windell H. Oskay,Thomas E. Parker,Jon H. Shirley,Jason Stalnaker +16 more
TL;DR: Tests of local position invariance and the variation of fundamental constants from measurements of the frequency ratio of the 282-nm 199Hg+ optical clock transition to the ground state hyperfine splitting in 133Cs show results similar to those reported for the absolute optical frequency measurements in H and 171Yb+ vs other 133Cs standards.