A new collaborative European project “International timescales with optical clocks” (ITOC) aims to tackle the key challenges that must be addressed prior to a redefinition of the SI second. A coordinated programme of comparisons will be carried out between European optical clocks developed in five different laboratories, enabling their performance levels to be validated at an unprecedented level of accuracy. Supporting work will be carried out to evaluate relativistic effects that influence the comparisons, including the gravitational redshift of the clock transition frequencies. A proof-of-principle experiment will also be performed to demonstrate that optical clocks could be used to make direct measurements of the Earth’s gravity potential with high temporal resolution.
International Timescales with Optical Clocks (ITOC) / Margolis, H. S.; Godun, R. M.; Gill, P.; Johnson, L. A. M.; Shemar, S. L.; Whibberley, P. B.; Calonico, Davide; Levi, Filippo; Lorini, L.; Pizzocaro, Marco; Delva, P.; Bize, S.; Achkar, J.; Denker, H.; Timmen, L.; Voigt, C.; Falke, S.; Piester, D.; Lisdat, C.; Sterr, U.; Vogt, S.; Weyers, S.; Gersl, J.; Lindvall, T.; Merimaa, M.. - (2013), pp. 908-911. (Intervento presentato al convegno 2013 Joint UFFC, EFTC and PFM Symposium tenutosi a Prague, CZ nel 21-25 luglio 2013) [10.1109/EFTF-IFC.2013.6702183].
International Timescales with Optical Clocks (ITOC)
CALONICO, DAVIDE;LEVI, FILIPPO;PIZZOCARO, MARCO;
2013
Abstract
A new collaborative European project “International timescales with optical clocks” (ITOC) aims to tackle the key challenges that must be addressed prior to a redefinition of the SI second. A coordinated programme of comparisons will be carried out between European optical clocks developed in five different laboratories, enabling their performance levels to be validated at an unprecedented level of accuracy. Supporting work will be carried out to evaluate relativistic effects that influence the comparisons, including the gravitational redshift of the clock transition frequencies. A proof-of-principle experiment will also be performed to demonstrate that optical clocks could be used to make direct measurements of the Earth’s gravity potential with high temporal resolution.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
