Results 21 to 30 of about 8,346 (279)

A clock network for geodesy and fundamental science

Nature Communications, 2016
Comparing the frequency of two distant optical clocks will enable sensitive tests of fundamental physics. Here, the authors compare two strontium optical-lattice clocks 690 kilometres apart to a degree of accuracy that is limited only by the uncertainty ...
C. Lisdat, G. Grosche, N. Quintin, C. Shi, S.M.F. Raupach, C. Grebing, D. Nicolodi, F. Stefani, A. Al-Masoudi, S. Dörscher, S. Häfner, J.-L. Robyr, N. Chiodo, S. Bilicki, E. Bookjans, A. Koczwara, S. Koke, A. Kuhl, F. Wiotte, F. Meynadier, E. Camisard, M. Abgrall, M. Lours, T. Legero, H. Schnatz, U. Sterr, H. Denker, C. Chardonnet, Y. Le Coq, G. Santarelli, A. Amy-Klein, R. Le Targat, J. Lodewyck, O Lopez, P.-E. Pottie   +34 more
doaj   +1 more source

Demonstration of the Systematic Evaluation of an Optical Lattice Clock Using the Drift-Insensitive Self-Comparison Method

Applied Sciences, 2021
The self-comparison method is a powerful tool in the uncertainty evaluation of optical lattice clocks, but any drifts will cause a frequency offset between the two compared clock loops and thus lead to incorrect measurement result.
Chihua Zhou, Xiaotong Lu, Benquan Lu, Yebing Wang, Hong Chang   +4 more
doaj   +1 more source

Development of a strontium optical lattice clock for the SOC mission on the ISS [PDF]

, 2015
Ultra-precise optical clocks in space will allow new studies in fundamental physics and astronomy. Within an European Space Agency (ESA) program, the Space Optical Clocks (SOC) project aims to install and to operate an optical lattice clock on the ...
Alighanbari, S., Barwood, G. P., Bize, S., Bongs, K., Gill, P., He, W., Hill, I. R., Holleville, D., Hughes, J., Kaenders, W., Kock, O., Lisdat, Ch., Lodewyck, J., Origlia, S., Ovchinnikov, Y. B., Poli, N., Schiller, S., Singh, Y., Smith, L., Sterr, U., Stuhler, J., Swierad, D., Targat, R. Le, team, the SOC2, Tino, G. M., Venon, B., Vogt, S.   +26 more
core   +5 more sources

Cancellation of collisional frequency shifts in optical lattice clocks with Rabi spectroscopy

New Journal of Physics, 2016
We analyze both the s- and p -wave collision induced frequency shifts and propose an over- π pulse scheme to cancel the shifts in optical lattice clocks interrogated by a Rabi pulse.
Sangkyung Lee, Chang Yong Park, Won-Kyu Lee, Dai-Hyuk Yu   +3 more
doaj   +1 more source

A simplified optical lattice clock [PDF]

Applied Physics B, 2009
Existing optical lattice clocks demonstrate a high level of performance, but they remain complex experimental devices. In order to address a wider range of applications including those requiring transportable devices, it will be necessary to simplify the laser systems and reduce the amount of support hardware.
POLI, NICOLA, M. G. Tarallo, SCHIOPPO, MARCO, C. W. Oates, TINO, GUGLIELMO MARIA   +4 more
openaire   +4 more sources

Terahertz Vibrational Molecular Clock with Systematic Uncertainty at the 10^{-14} Level

Physical Review X, 2023
Neutral quantum absorbers in optical lattices have emerged as a leading platform for achieving clocks with exquisite spectroscopic resolution. However, the studies of these clocks and their systematic shifts have so far been limited to atoms.
K. H. Leung, B. Iritani, E. Tiberi, I. Majewska, M. Borkowski, R. Moszynski, T. Zelevinsky   +6 more
doaj   +1 more source

Towards a Re-definition of the Second Based on Optical Atomic Clocks [PDF]

, 2015
The rapid increase in accuracy and stability of optical atomic clocks compared to the caesium atomic clock as primary standard of time and frequency asks for a future re-definition of the second in the International System of Units (SI).
Riehle, Fritz
core   +2 more sources

The Space Optical Clocks Project: Development of high-performance transportable and breadboard optical clocks and advanced subsystems [PDF]

, 2012
The use of ultra-precise optical clocks in space ("master clocks") will allow for a range of new applications in the fields of fundamental physics (tests of Einstein's theory of General Relativity, time and frequency metrology by means of the comparison ...
Abou-Jaoudeh, C., Alighanbari, S., Barwood, G., Bize, S., Bongs, K., Braxmaier, C., Calonico, D., Donati, A., Falke, S., Franzen, T., Gill, P., Görlitz, A., Holzwarth, R., Kaenders, W., Kulosa, A., Lecomte, S., Levi, F., Lisdat, Ch., Lodewyck, J., Mura, G., Nevsky, A., Ovchinnikov, Y., Poli, N., Rasel, E., Schiller, S., Schioppo, M., Singh, Y., Sterr, U., Stuhler, J., Tino, G. M., Vasilyev, S.   +30 more
core   +5 more sources

An Evaluation of the Zeeman Shift of the ⁸⁷Sr Optical Lattice Clock at the National Time Service Center

Applied Sciences, 2020
The Zeeman shift plays an important role in the evaluation of optical lattice clocks since a strong bias magnetic field is applied for departing Zeeman sublevels and defining a quantization axis.
Xiaotong Lu, Mojuan Yin, Ting Li, Yebing Wang, Hong Chang   +4 more
doaj   +1 more source

A protocol of potential advantage in the low frequency range to gravitational wave detection with space based optical atomic clocks

, 2020
A recent proposal describes space based gravitational wave (GW) detection with optical lattice atomic clocks [Kolkowitz et. al., Phys. Rev. D 94, 124043 (2016)] [1].
He, Feifan, Zhang, Baocheng
core   +1 more source