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24 results on '"Bregolin, Filippo"'

1. Modeling light shifts in optical lattice clocks

Author

Nemitz, Nils, Jørgensen, Asbjørn Arvad, Yanagimoto, Ryotatsu, Bregolin, Filippo, and Katori, Hidetoshi

Subjects
Physics - Atomic Physics
Abstract

We present an extended model for the lattice-induced light shifts of the clock frequency in optical lattice clocks, applicable to a wide range of operating conditions. The model extensions cover radial motional states with sufficient energies to invalidate the harmonic approximation of the confining potential. We reevaluate lattice-induced light shifts in our Yb optical lattice clock with an uncertainty of 6.1E-18 under typical clock operating conditions., Comment: 12 pages, 10 figures

Published
2019
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2. Decomposed description of Ramsey spectra under atomic interactions

Author

Yanagimoto, Ryotatsu, Nemitz, Nils, Bregolin, Filippo, and Katori, Hidetoshi

Subjects
Physics - Atomic Physics
Abstract

We introduce a description of Ramsey spectra under atomic interactions as a sum of decomposed components with differing dependence on interaction parameters. This description enables intuitive understanding of the loss of contrast and asymmetry of Ramsey spectra. We derive a quantitative relationship between the asymmetry and atomic interaction parameters, which enables their characterization without changing atom density. The model is confirmed through experiments with a Yb optical lattice clock.

Published
2018
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3. Geodesy and metrology with a transportable optical clock

Author

Grotti, Jacopo, Koller, Silvio, Vogt, Stefan, Häfner, Sebastian, Sterr, Uwe, Lisdat, Christian, Denker, Heiner, Voigt, Christian, Timmen, Ludger, Rolland, Antoine, Baynes, Fred N., Margolis, Helen S., Zampaolo, Michel, Thoumany, Pierre, Pizzocaro, Marco, Rauf, Benjamin, Bregolin, Filippo, Tampellini, Anna, Barbieri, Piero, Zucco, Massimo, Costanzo, Giovanni A., Clivati, Cecilia, Levi, Filippo, and Calonico, Davide

Subjects
Physics - Atomic Physics
Abstract

The advent of novel measurement instrumentation can lead to paradigm shifts in scientific research. Optical atomic clocks, due to their unprecedented stability and uncertainty, are already being used to test physical theories and herald a revision of the International System of units (SI). However, to unlock their potential for cross-disciplinary applications such as relativistic geodesy, a major challenge remains. This is their transformation from highly specialized instruments restricted to national metrology laboratories into flexible devices deployable in different locations. Here we report the first field measurement campaign performed with a ubiquitously applicable $^{87}$Sr optical lattice clock. We use it to determine the gravity potential difference between the middle of a mountain and a location 90 km apart, exploiting both local and remote clock comparisons to eliminate potential clock errors. A local comparison with a $^{171}$Yb lattice clock also serves as an important check on the international consistency of independently developed optical clocks. This campaign demonstrates the exciting prospects for transportable optical clocks.

Published
2017
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4. Absolute frequency measurement of the 1S0 - 3P0 transition of 171Yb

Author

Pizzocaro, Marco, Thoumany, Pierre, Rauf, Benjamin, Bregolin, Filippo, Milani, Gianmaria, Clivati, Cecilia, Costanzo, Giovanni A., Levi, Filippo, and Calonico, Davide

Subjects
Physics - Atomic Physics
Abstract

We report the absolute frequency measurement of the unperturbed transition 1S0 - 3P0 at 578 nm in 171Yb realized in an optical lattice frequency standard. The absolute frequency is measured 518 295 836 590 863.55(28) Hz relative to a cryogenic caesium fountain with a fractional uncertainty of 5.4x10-16 . This value is in agreement with the ytterbium frequency recommended as a secondary representation of the second in the International System of Units., Comment: This is an author-created, un-copyedited version of an article accepted for publication/published in Metrologia. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/1681-7575/aa4e62. It is published under a CC BY licence

Published
2016
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5. Intercontinental comparison of optical atomic clocks through very long baseline interferometry

Author

Pizzocaro, Marco, Sekido, Mamoru, Takefuji, Kazuhiro, Ujihara, Hideki, Hachisu, Hidekazu, Nemitz, Nils, Tsutsumi, Masanori, Kondo, Tetsuro, Kawai, Eiji, Ichikawa, Ryuichi, Namba, Kunitaka, Okamoto, Yoshihiro, Takahashi, Rumi, Komuro, Junichi, Clivati, Cecilia, Bregolin, Filippo, Barbieri, Piero, Mura, Alberto, Cantoni, Elena, Cerretto, Giancarlo, Levi, Filippo, Maccaferri, Giuseppe, Roma, Mauro, Bortolotti, Claudio, Negusini, Monia, Ricci, Roberto, Zacchiroli, Giampaolo, Roda, Juri, Leute, Julia, Petit, Gérard, Perini, Federico, Calonico, Davide, and Ido, Tetsuya

Published
2021
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6. Geodesy and metrology with a transportable optical clock

Author

Grotti, Jacopo, Koller, Silvio, Vogt, Stefan, Häfner, Sebastian, Sterr, Uwe, Lisdat, Christian, Denker, Heiner, Voigt, Christian, Timmen, Ludger, Rolland, Antoine, Baynes, Fred N., Margolis, Helen S., Zampaolo, Michel, Thoumany, Pierre, Pizzocaro, Marco, Rauf, Benjamin, Bregolin, Filippo, Tampellini, Anna, Barbieri, Piero, Zucco, Massimo, Costanzo, Giovanni A., Clivati, Cecilia, Levi, Filippo, and Calonico, Davide

Published
2018
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8. Precise Frequency Transfer with Broadband Transportable VLBI Stations

Author

Sekido, Mamoru, primary, Pizzocaro, Marco, additional, Takefuji, Kazuhiro, additional, Ujihara, Hideki, additional, Hachisu, Hidekazu, additional, Nemitz, Nils, additional, Tsutsumi, Masanori, additional, Kondo, Tetsuro, additional, Kawai, Eiji, additional, Ichikawa, Ryuichi, additional, Namba, Kunitaka, additional, Okamoto, Yoshihiro, additional, Takahashi, Rumi, additional, Komuro, Junichi, additional, Clivati, Cecilia, additional, Bregolin, Filippo, additional, Barbieri, Piero, additional, Mura, Alberto, additional, Cantoni, Elena, additional, Cerretto, Giancarlo, additional, Levi, Filippo, additional, Maccaferri, Giuseppe, additional, Roma, Mauro, additional, Bortolotti, Claudio, additional, Negusini, Monia, additional, Ricci, Roberto, additional, Zacchiroli, Giampaolo, additional, Roda, Juri, additional, Leute, Julia, additional, Petit, Gérard, additional, Perini, Federico, additional, Calonico, Davide, additional, and Ido, Tetsuya, additional

Published
2021
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9. Intercontinental comparison of optical atomic clocks through very long baseline interferometry

Author

Pizzocaro, Marco, primary, Sekido, Mamoru, additional, Takefuji, Kazuhiro, additional, Ujihara, Hideki, additional, Hachisu, Hidekazu, additional, Nemitz, Nils, additional, Tsutsumi, Masanori, additional, Kondo, Tetsuro, additional, Kawai, Eiji, additional, Ichikawa, Ryuichi, additional, Namba, Kunitaka, additional, Okamoto, Yoshihiro, additional, Takahashi, Rumi, additional, Komuro, Junichi, additional, Clivati, Cecilia, additional, Bregolin, Filippo, additional, Barbieri, Piero, additional, Mura, Alberto, additional, Cantoni, Elena, additional, Cerretto, Giancarlo, additional, Levi, Filippo, additional, Maccaferri, Giuseppe, additional, Roma, Mauro, additional, Bortolotti, Claudio, additional, Negusini, Monia, additional, Ricci, Roberto, additional, Zacchiroli, Giampaolo, additional, Roda, Juri, additional, Leute, Julia, additional, Petit, Gérard, additional, Perini, Federico, additional, Calonico, Davide, additional, and Ido, Tetsuya, additional

Published
2020
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14. Optical Atomic Clocks: From International Timekeeping to Gravity Potential Measurement

Author

Margolis, Helen S., primary, Denker, Heiner, additional, Voigt, Christian, additional, Timmen, Ludger, additional, Grotti, Jacopo, additional, Koller, Silvio, additional, Vogt, Stefan, additional, Häfner, Sebastian, additional, Sterr, Uwe, additional, Lisdat, Christian, additional, Rolland, Antoine, additional, Baynes, Fred N., additional, Zampaolo, Michel, additional, Thoumany, Pierre, additional, Pizzocaro, Marco, additional, Rauf, Benjamin, additional, Bregolin, Filippo, additional, Tampellini, Anna, additional, Barbieri, Piero, additional, Zucco, Massimo, additional, Costanzo, Giovanni A., additional, Clivati, Cecilia, additional, Levi, Filippo, additional, and Calonico, Davide, additional

Published
2019
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21. Metrological characterization of INRIM's Yb lattice clock

Author

Rauf, Benjamin, primary, Pizzocaro, Marco, additional, Thoumany, Pierre, additional, Milani, Gianmaria, additional, Bregolin, Filippo, additional, Gozzelino, Michele, additional, Calonico, Davide, additional, Costanzo, Giovanni Antonio, additional, Clivati, Cecilia, additional, and Levi, Filippo, additional

Published
2016
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22. Ytterbium optical lattice clock at INRIM

Author

Pizzocaro, Marco, primary, Bregolin, Filippo, additional, Milani, Gianmaria, additional, Rauf, Benjamin, additional, Thoumany, Pierre, additional, Costanzo, Giovanni Antonio, additional, Levi, Filippo, additional, and Calonico, Davide, additional

Published
2015
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24. Broadband geodetic VLBI system and its application to optical clock comparison.

Author

Sekido, Mamoru, Takefuji, Kazuhiro, Ujihara, Hideki, Tsutsumi, Masanori, Kondo, Tetsuro, Kawai, Eiji, Ichikawa, Ryuichi, Hachisu, Hidekazu, Nemitz, Nils, Ido, Tetsuya, Pizzocaro, Marco, Bregolin, Filippo, Levi, Filippo, Mura, Alberto, Clivati, Cecilia, Cerretto, Giancalo, Calonico, Davide, Perini, Federico, Negusini, Monia, and Ricci, Roberto

Published
2019

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