Final project reports Final Publishable Summary Final Publishable Report Guidelines Guidelines on the evaluation and reporting of correlation coefficients between frequency ratio measurements (deliverable D3) Helen Margolis and Marco Pizzocaro (July 2020) Papers Coherent optical-fiber link across Italy and France C. Clivati, M. Pizzocaro, E. K. Bertacco, S. Condio, G. A. Costanzo, S. Donadello, I. Goti, M. Gozzelino, F. Levi, A. Mura, M. Risaro, D. Calonico, M. Tønnes, B. Pointard, M. Mazouth-Laurol, R. Le Targat, M. Abgrall, M. Lours, H. Le Goff, L. Lorini, P.-E. Pottie, E. Cantin, O. Lopez, C. Chardonnet, and A. Amy-Klein Phys. Rev. Applied 18, 054009 (2022) Associated dataset Coherent fiber links operated for years: effect of missing data M. B. K. Tønnes, F. Schuller, E. Cantin, O. Lopez, R. Le Targat, A. Amy-Klein and P.-E. Pottie Metrologia 59, 065004(2022) Associated dataset High-accuracy determination of Paul-trap stability parameters for electric-quadrupole-shift prediction T. Lindvall, K. J. Hanhijärvi, T. Fordell and A. E. Wallin Journal of Applied Physics 132, 124401 (2022) Open access version Associated dataset Robustness tests for an optical time scale V. Formichella, L. Galleani, G. Signorile and I. Sesia Metrologia 59, 015002 (2022) Associated dataset Comparing ultrastable lasers at 7×10-17 fractional frequency instability through a 2220 km optical fibre network M. Schioppo. J. Kronjäger, A. Silva, R. Ilieva, J. W. Paterson, C. F. A. Baynham, W. Bowden, I. R. Hill, R. Hobson, A. Vianello, M. Dovale-Álvarez, R. A. Williams, G. Marra, H. S. Margolis, A. Amy-Klein, O. Lopez, E. Cantin, H. Álvarez-Martínez, R. Le Targat, P. E. Pottie, N. Quintin, T. Legero, S. Häfner, U. Sterr, R. Schwarz, S. Dörscher, C. Lisdat, S. Koke, A. Kuhl, T. Waterholter, E. Benkler and G. Grosche Nature Communications 13, 212 (2022) Associated dataset Blackbody radiation shift in strontium lattice clocks revisited C. Lisdat, S. Dörscher, I. Nosske and U. Sterr Phys. Rev. Research 3, L042036 (2021) Associated dataset Intercontinental comparison of optical atomic clocks through very long baseline interferometry M. Pizzocaro, M. Sekido, K. Takefuji, H. Ujihara, H. Hachisu, N. Nemitz, M. Tsutsumi, T. Kondo, E. Kawai, R. Ichikawa, K. Namba, Y. Okamoto, R. Takahashi, J. Komuro, C. Clivati, F. Bregolin, P. Barbieri, A. Mura, E. Cantoni, G. Cerretto, F. Levi, G. Maccaferri, M. Roma, C. Bortolotti, M. Negusini, R. Ricci, G. Zacchiroli, J. Roda, J. Leute, G. Petit, F. Perini, D. Calonico and T. Ido Nature Physics 17, 223 – 227 (2021) Associated dataset Improved limits for violations of local position invariance from atomic clock comparisons R. Lange, N. Huntemann, J. M. Rahn, C. Sanner, H. Shao, B. Lipphardt, C. Tamm, S. Weyers and E. Peik Physical Review Letters 126, 011102 (2021) Associated dataset Optical frequency ratio of a 171Yb+ single-ion clock and a 87Sr lattice clock S. Dörscher, N. Huntemann, R. Schwarz, R. Lange, E. Benkler, B. Lipphardt, U. Sterr, E. Peik and C. Lisdat Metrologia 58, 015005 (2021) Associated dataset Universal formalism for data sharing and processing in clock comparison networks J. Jodewyck, R. Le Targat, P.-E. Pottie, E. Benkler, S. Koke and J. Kronjäger Physical Review Research 2, 043269 (2020) Coherent suppression of tensor frequency shifts through magnetic field rotation R. Lange, N. Huntemann, C. Sanner, H. Shao, B. Lipphardt, C. Tamm and E. Peik Physical Review Letters 125, 143201 (2020) Associated dataset Long term measurement of the 87Sr clock frequency at the limit of primary Cs clocks R. Schwarz, S. Dörscher, A. Al-Masoudi, E. Benkler, T. Legero, U. Sterr, S. Weyers, J. Rahm, B. Lipphardt and C. Lisdat Physical Review Research 2, 033242 (2020) Associated dataset Coherent excitation of the highly forbidden electric octupole transition in 172Yb+ H. A. Fürst, C.-H. Yeh, D. Kalincev, A. P. Kulosa, L. S. Dreissen, R. Lange, E. Benkler, N. Huntemann, E. Peik and T. E. Mehlstäubler Physical Review Letters 125, 163001 (2020) Associated dataset Absolute frequency measurement of the 1S0 – 3P0 transition of 171Yb with a link to International Atomic Time M. Pizzocaro, F. Bregolin, P. Barbieri, B. Rauf, F. Levi and D. Calonico Metrologia 57, 035007 (2020) Associated dataset End-to-end topology for fiber comb based optical frequency transfer at the 10-21 level E. Benkler, B. Lipphardt, T. Puppe, R. Wilk, R. Rohde and U. Sterr Optics Express 27, 36886 – 36902 (2019) Associated dataset Theses Reducing the statistical and systematic uncertainty of the VTT MIKES 88Sr+ ion clock Lauri Seppäläinen Master thesis in physics, Aalto University, Finland Optical lattice clock with an amplified laser diode Stefano Condio Master thesis in physics, University of Torino, Italy Talks A brief history of timekeeping (given by Helen Margolis as part of the 2021 Orkney International Science Festival) Optical lattice clocks at NPL (seminar by William Bowden) http://empir.npl.co.uk/rocit/wp-content/uploads/sites/52/2020/07/Seminarium-Katedry-Fizyki-Atomowej-Molekularnej-i-Optycznej-20200619-1020-1.mp4 Funding statement: This project 18SIB05 ROCIT has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. Publicity resources – repository instructions and EURAMET logos.
