Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Hill, Ian R."'
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
Quantum non-demolition (QND) measurement is a remarkable tool for the manipulation of quantum systems. It allows specific information to be extracted while still preserving fragile quantum observables of the system. Here we apply cavity-based QND mea
Externí odkaz:
http://arxiv.org/abs/2010.10419
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
We report on the realization of a magneto-optical trap (MOT) for metastable strontium operating on the 2.92 $\mu$m transition between the energy levels $5s5p~^3\mathrm{P}_2$ and $5s4d~^3\mathrm{D}_3$. The strontium atoms are initially captured in a M
Externí odkaz:
http://arxiv.org/abs/2001.05210
We demonstrate a new method of cavity-enhanced non-destructive detection of atoms for a strontium optical lattice clock. The detection scheme is shown to be linear in atom number up to at least 10,000 atoms, to reject technical noise sources, to achi
Externí odkaz:
http://arxiv.org/abs/1912.09874
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:
Bowden, William, Hobson, Richard, Huillery, Paul, Gill, Patrick, Jones, Matthew P. A., Hill, Ian R.
Publikováno v:
Phys. Rev. A 96, 023419 (2017)
Electrometry is performed using Rydberg states to evaluate the quadratic Stark shift of the $5s^2$ $^1\textrm{S}_0-5s5p$ $^3\textrm{P}_0$ clock transition in strontium. By measuring the Stark shift of the highly excited $5s75d\;^1\textrm{D}_2$ state
Externí odkaz:
http://arxiv.org/abs/1706.01944
Autor:
Carl, Christian S., Jensen, Marie M., Sjøberg, Kim A., Constantin-Teodosiu, Dumitru, Hill, Ian R., Kjøbsted, Rasmus, Greenhaff, Paul L., Wojtaszewski, Jørgen F.P., Richter, Erik A., Fritzen, Andreas M., Kiens, Bente
Publikováno v:
Diabetes; Jul2024, Vol. 73 Issue 7, p1072-1083, 12p
Autor:
Hill, Ian R., Hobson, Richard, Bowden, William, Bridge, Elizabeth M., Donnellan, Sean, Curtis, E. Anne, Gill, Patrick
We describe the Sr optical lattice clock apparatus at NPL with particular emphasis on techniques used to increase reliability and minimise the human requirement in its operation. Central to this is a clock-referenced transfer cavity scheme for the st
Externí odkaz:
http://arxiv.org/abs/1602.05810