Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Margolis, Helen S."'
Autor:
Tofful, Alexandra, Baynham, Charles F. A., Curtis, E. Anne, Parsons, Adam O., Robertson, Billy I., Schioppo, Marco, Tunesi, Jacob, Margolis, Helen S., Hendricks, Richard J., Whale, Josh, Thompson, Richard C., Godun, Rachel M.
A full evaluation of the uncertainty budget for the ytterbium ion optical clock at the National Physical Laboratory (NPL) was performed on the electric octupole (E3) $^2\mathrm{S}_{1/2}\,\rightarrow\, ^2\mathrm{F}_{7/2}$ transition. The total systema
Externí odkaz:
http://arxiv.org/abs/2403.14423
Autor:
Sherrill, Nathaniel, Parsons, Adam O., Baynham, Charles F. A., Bowden, William, Curtis, E. Anne, Hendricks, Richard, Hill, Ian R., Hobson, Richard, Margolis, Helen S., Robertson, Billy I., Schioppo, Marco, Szymaniec, Krzysztof, Tofful, Alexandra, Tunesi, Jacob, Godun, Rachel M., Calmet, Xavier
Publikováno v:
New J.Phys. 25 (2023) 9, 093012
We present a new framework to study the time variation of fundamental constants in a model-independent way. Model independence implies more free parameters than assumed in previous studies. Using data from atomic clocks based on $^{87}$Sr, $^{171}$Yb
Externí odkaz:
http://arxiv.org/abs/2302.04565
Autor:
Hobson, Richard, Bowden, William, Silva, Alissa, Baynham, Charles F. A., Margolis, Helen S., Baird, Patrick E. G., Gill, Patrick, Hill, Ian R.
We present a measurement of the absolute frequency of the 5s$^2$ $^1$S$_0$ to 5s5p $^3$P$_0$ transition in $^{87}$Sr, which is a secondary representation of the SI second. We describe the optical lattice clock apparatus used for the measurement, and
Externí odkaz:
http://arxiv.org/abs/2005.10857
Autor:
Bowden, William, Hobson, Richard, Hill, Ian R., Vianello, Alvise, Schioppo, Marco, Silva, Alissa, Margolis, Helen S., Baird, Patrick E. G., Gill, Patrick
We realize a two-stage, hexagonal pyramid magneto-optical trap (MOT) with strontium, and demonstrate loading of cold atoms into cavity-enhanced 1D and 2D optical lattice traps, all within a single compact assembly of in-vacuum optics. We show that th
Externí odkaz:
http://arxiv.org/abs/1907.13429
Autor:
Abdel-Hafiz, Moustafa, Ablewski, Piotr, Al-Masoudi, Ali, Martínez, Héctor Álvarez, Balling, Petr, Barwood, Geoffrey, Benkler, Erik, Bober, Marcin, Borkowski, Mateusz, Bowden, William, Ciuryło, Roman, Cybulski, Hubert, Didier, Alexandre, Doležal, Miroslav, Dörscher, Sören, Falke, Stephan, Godun, Rachel M., Hamid, Ramiz, Hill, Ian R., Hobson, Richard, Huntemann, Nils, Coq, Yann Le, Targat, Rodolphe Le, Legero, Thomas, Lindvall, Thomas, Lisdat, Christian, Lodewyck, Jérôme, Margolis, Helen S., Mehlstäubler, Tanja E., Peik, Ekkehard, Pelzer, Lennart, Pizzocaro, Marco, Rauf, Benjamin, Rolland, Antoine, Scharnhorst, Nils, Schioppo, Marco, Schmidt, Piet O., Schwarz, Roman, Şenel, Çağrı, Spethmann, Nicolas, Sterr, Uwe, Tamm, Christian, Thomsen, Jan W., Vianello, Alvise, Zawada, Michał
There has been tremendous progress in the performance of optical frequency standards since the first proposals to carry out precision spectroscopy on trapped, single ions in the 1970s. The estimated fractional frequency uncertainty of today's leading
Externí odkaz:
http://arxiv.org/abs/1906.11495
Autor:
Baynham, Charles F. A., Godun, Rachel M., Jones, Jonathan M., King, Steven A., Nisbet-Jones, Peter B. R., Baynes, Fred, Rolland, Antoine, Baird, Patrick E. G., Bongs, Kai, Gill, Patrick, Margolis, Helen S.
The highly forbidden $^2$S$_{1/2} \rightarrow ^2$F$_{7/2}$ electric octupole transition in $^{171}$Yb$^+$ is a potential candidate for a redefinition of the SI second. We present a measurement of the absolute frequency of this optical transition, per
Externí odkaz:
http://arxiv.org/abs/1707.00646
Autor:
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, Calonico, Davide
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
Externí odkaz:
http://arxiv.org/abs/1705.04089
We demonstrate an amplitude-to-phase (AM-PM) conversion coefficient for a balanced optical-microwave phase detector (BOM-PD) of 0.001 rad, corresponding to AM-PM induced phase noise 60 dB below the single-sideband relative intensity noise of the lase
Externí odkaz:
http://arxiv.org/abs/1309.1116
Autor:
Margolis, Helen S.
Publikováno v:
Science, 2013 Sep . 341(6151), 1185-1186.
Externí odkaz:
http://dx.doi.org/10.1126/science.1243654
Autor:
Margolis, Helen S.
Publikováno v:
Science, 2013 Jan . 339(6118), 405-406.
Externí odkaz:
http://dx.doi.org/10.1126/science.1233202