Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Christopher W. Oates"'
Autor:
Andrew D. Ludlow, Christopher W. Oates, Tara M. Fortier, Richard E. Stoner, Judith Olson, Holly Leopardi, Todd F. Sheerin, Roger C. Brown, Richard W. Fox
Publikováno v:
Physical Review Letters. 123
We demonstrate Ramsey-Borde (RB) atom interferometry for high performance laser stabilization with fractional frequency instability
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0376ea24ff52ab68fa5e7b0f0e9f6b20
https://doi.org/10.1103/physrevlett.123.073202
https://doi.org/10.1103/physrevlett.123.073202
Autor:
Jeff Sherman, Andrew D. Ludlow, Xiaogang Zhang, Stefan A. Schäffer, Holly Leopardi, Thomas E. Parker, W. F. McGrew, Christopher W. Oates, Joshua J. Savory, K. Beloy, Roger C. Brown, Stefania Romisch, R. J. Fasano, Jian Yao, Tara M. Fortier, Daniele Nicolodi
Publikováno v:
McGrew, W F, Zhang, X, Leopardi, H, Fasano, R J, Nicolodi, D, Beloy, K, Yao, J, Sherman, J A, Schaffer, S A, Savory, J, Brown, R C, Romisch, S, Oates, C W, Parker, T E, Fortier, T M & Ludlow, A D 2019, ' Towards the optical second : verifying optical clocks at the SI limit ', Optica, vol. 6, no. 4, pp. 448-454 . https://doi.org/10.1364/OPTICA.6.000448
The pursuit of ever more precise measures of time and frequency motivates redefinition of the second in terms of an optical atomic transition. To ensure continuity with the current definition, based on the microwave hyperfine transition in Cs133, it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5833911f292c921bb71632df1a00bea7
https://curis.ku.dk/ws/files/217380482/optica_6_4_448.pdf
https://curis.ku.dk/ws/files/217380482/optica_6_4_448.pdf
Autor:
Jian Yao, Holly Leopardi, W. F. McGrew, Tara M. Fortier, K. Beloy, R. J. Fasano, Andrew D. Ludlow, Thomas E. Parker, Christopher W. Oates, Joshua J. Savory, Xiaogang Zhang, Judah Levine, Scott A. Diddams, Daniele Nicolodi, Stefania Romisch, Stefan A. Schäffer, Jeff Sherman
Publikováno v:
Phys Rev Appl
A time scale is a procedure for accurately and continuously marking the passage of time. It is exemplified by Coordinated Universal Time (UTC), and provides the backbone for critical navigation tools such as the Global Positioning System (GPS). Prese
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9f86b455977eaf1dffca41dfe72b7a5
http://arxiv.org/abs/1902.06858
http://arxiv.org/abs/1902.06858
Publikováno v:
2018 Conference on Precision Electromagnetic Measurements (CPEM 2018).
We demonstrate laser frequency stabilization at the $\pmb{10^{-16}}$ fractional frequency level in one second through spectroscopy on a 650°C calcium atomic beam. The calcium beam is interrogated with a cavity stabilized 657 nm laser arranged in a R
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79b8a0399191bef27fc8ddda281cccf3
https://doi.org/10.1109/cpem.2018.8500877
https://doi.org/10.1109/cpem.2018.8500877
Autor:
Christopher W. Oates, Judith Olson, Andrew D. Ludlow, Todd F. Sheerin, Richard W. Fox, Roger C. Brown, Tara M. Fortier
Publikováno v:
2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS).
We describe a system for high-performance laser stabilization using Ramsey-Borde interferometry with calcium.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a451c0ad052e9dc50e393e6869c3736d
https://doi.org/10.1109/fcs.2017.8088793
https://doi.org/10.1109/fcs.2017.8088793
Publikováno v:
Journal of Bacteriology. 193:3367-3375
The bacterial cell envelope is the interface between a bacterium and its environment and is constantly exposed to environmental changes. The BaeSR two-component system regulates one of six envelope stress responses in Escherichia coli and is induced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7044c5d12dc0d085bdfba73f967f84e
https://doi.org/10.1128/jb.01534-10
https://doi.org/10.1128/jb.01534-10
Autor:
Richard W. Fox, Nathan D. Lemke, L . Ma, Andrew D. Ludlow, Jeff Sherman, Yanyi Jiang, Christopher W. Oates
Publikováno v:
Nature Photonics. 5:158-161
The superb precision of an atomic clock is derived from its stability. Atomic clocks based on optical (rather than microwave) frequencies are attractive because of their potential for high stability, which scales with operational frequency. Neverthel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9590cdb8562fae2f76770579c9866411
https://doi.org/10.1038/nphoton.2010.313
https://doi.org/10.1038/nphoton.2010.313
Autor:
Steven R. Jefferts, Scott A. Diddams, Nathan R. Newbury, Peter L. Bender, Christopher W. Oates, John L. Hall, Stefano Vitale, Neil Ashby, Jun Ye, Rita Dolesi, W. J. Weber
Publikováno v:
Proceedings of the International Astronomical Union. 5:414-419
Improved accuracy in measurement of the gravitational time delay of electromagnetic waves passing by the sun may be achieved with two drag-free spacecraft, one with a stable clock and laser transmitter and one with a high-stability transponder. We co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::522baecb94046ff0ee60a5073b6430c2
https://doi.org/10.1017/s1743921309990718
https://doi.org/10.1017/s1743921309990718
Autor:
Jason Stalnaker, Michael J. Martin, Tanya Zelevinsky, Andrew D. Ludlow, Nathan D. Lemke, Gretchen K. Campbell, M. H. G. de Miranda, Y. Le Coq, Z. W. Barber, Nicola Poli, Tara M. Fortier, Martin M. Boyd, Kristin M. Beck, Christopher W. Oates, Sebastian Blatt, Scott A. Diddams, Jun Ye, Seth M. Foreman, Jan W. Thomsen
Publikováno v:
Science. 319:1805-1808
Optical atomic clocks promise timekeeping at the highest precision and accuracy, owing to their high operating frequencies. Rigorous evaluations of these clocks require direct comparisons between them. We have realized a high-performance remote compa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cb65e90f3c72b5c803109308c1fd5db
https://doi.org/10.1126/science.1153341
https://doi.org/10.1126/science.1153341
Autor:
Jeffrey W. Nicholson, Luca Lorini, Nathan R. Newbury, K.S. Feder, Ian Coddington, William C. Swann, Qudsia Quraishi, Christopher W. Oates, Y. Le Coq, Paul S. Westbrook, Scott A. Diddams, J. C. Bergquist
Publikováno v:
Nature Photonics. 1:283-287
Coherent optical link over hundreds of metres and hundreds of terahertz with subfemtosecond timing jitter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::176ef0d2ea8fc203f9849f872dadfd67
https://doi.org/10.1038/nphoton.2007.71
https://doi.org/10.1038/nphoton.2007.71