Zobrazeno 1 - 10
of 322
pro vyhledávání: '"Dörscher S"'
Autor:
Hausser, H. N., Keller, J., Nordmann, T., Bhatt, N. M., Kiethe, J., Liu, H., Richter, I. M., von Boehn, M., Rahm, J., Weyers, S., Benkler, E., Lipphardt, B., Doerscher, S., Stahl, K., Klose, J., Lisdat, C., Filzinger, M., Huntemann, N., Peik, E., Mehlstäubler, T. E.
We present a scalable mixed-species Coulomb crystal clock based on the $^1S_0$ $\leftrightarrow$ $^3P_0$ transition in $^{115}$In$^+$. $^{172}$Yb$^+$ ions are co-trapped and used for sympathetic cooling. Reproducible interrogation conditions for mixe
Externí odkaz:
http://arxiv.org/abs/2402.16807
Autor:
Grotti, J., Nosske, I., Koller, S. B., Herbers, S., Denker, H., Timmen, L., Vishnyakova, G., Grosche, G., Waterholter, T., Kuhl, A., Koke, S., Benkler, E., Giunta, M., Maisenbacher, L., Matveev, A., Dörscher, S., Schwarz, R., Al-Masoudi, A., Hänsch, T. W., Udem, Th., Holzwarth, R., Lisdat, C.
Publikováno v:
Phys. Rev. Appl. 21, L061001 (2024)
We have measured the geopotential difference between two locations separated by $457~\mathrm{km}$ by comparison of two optical lattice clocks via an interferometric fiber link, utilizing the gravitational redshift of the clock transition frequency. T
Externí odkaz:
http://arxiv.org/abs/2309.14953
Autor:
Filzinger, M., Dörscher, S., Lange, R., Klose, J., Steinel, M., Benkler, E., Peik, E., Lisdat, C., Huntemann, N.
Publikováno v:
Phys. Rev. Lett. 130, 253001 (2023)
We present improved constraints on the coupling of ultralight bosonic dark matter to photons based on long-term measurements of two optical frequency ratios. In these optical clock comparisons, we relate the frequency of the ${}^2S_{1/2} (F=0)\leftri
Externí odkaz:
http://arxiv.org/abs/2301.03433
Autor:
Schwarz, R., Dörscher, S., Al-Masoudi, A., Benkler, E., Legero, T., Sterr, U., Weyers, S., Rahm, J., Lipphardt, B., Lisdat, C.
Publikováno v:
Phys. Rev. Research 2, 033242 (2020)
We report on a series of 42 measurements of the transition frequency of the 429~THz (5s$^2$)~$^1$S$_0$--(5s5p)~$^3$P$_0$ line in $^{87}$Sr taken over three years from 2017 to 2019. They have been performed at the Physikalisch-Technische Bundesanstalt
Externí odkaz:
http://arxiv.org/abs/2005.07408
Autor:
Riedel, F., Al-Masoudi, A., Benkler, E., Dörscher, S., Gerginov, V., Grebing, C., Häfner, S., Huntemann, N., Lipphardt, B., Lisdat, C., Peik, E., Piester, D., Sanner, C., Tamm, C., Weyers, S., Denker, H., Timmen, L., Voigt, C., Calonico, D., Cerretto, G., Costanzo, G. A., Levi, F., Sesia, I., Achkar, J., Guèna, J., Abgrall, M., Rovera, D., Chupin, B., Shi, C., Bilicki, S., Bookjans, E., Lodewyck, J., Targat, R. Le, Delva, P., Bize, S., Baynes, F. N., Baynham, C. F. A., Bowden, W., Gill, P., Godun, R. M., Hill, I. R., Hobson, R., Jones, J. M., King, S. A., Nisbet-Jones, P. B. R., Rolland, A., Shemar, S. L., Whibberley, P. B., Margolis, H. S.
We carried out a 26-day comparison of five simultaneously operated optical clocks and six atomic fountain clocks located at INRIM, LNE-SYRTE, NPL and PTB by using two satellite-based frequency comparison techniques: broadband Two-Way Satellite Time a
Externí odkaz:
http://arxiv.org/abs/1910.06736
Autor:
Roberts, B. M., Delva, P., Al-Masoudi, A., Amy-Klein, A., Bærentsen, C., Baynham, C. F. A., Benkler, E., Bilicki, S., Bize, S., Bowden, W., Calvert, J., Cambier, V., Cantin, E., Curtis, E. A., Dörscher, S., Favier, M., Frank, F., Gill, P., Godun, R. M., Grosche, G., Guo, C., Hees, A., Hill, I. R., Hobson, R., Huntemann, N., Kronjäger, J., Koke, S., Kuhl, A., Lange, R., Legero, T., Lipphardt, B., Lisdat, C., Lodewyck, J., Lopez, O., Margolis, H. S., Álvarez-Martínez, H., Meynadier, F., Ozimek, F., Peik, E., Pottie, P. -E., Quintin, N., Sanner, C., De Sarlo, L., Schioppo, M., Schwarz, R., Silva, A., Sterr, U., Tamm, Chr., Targat, R. Le, Tuckey, P., Vallet, G., Waterholter, T., Xu, D., Wolf, P.
Publikováno v:
New J. Phys. 22, 093010 (2020)
We search for transient variations of the fine structure constant using data from a European network of fiber-linked optical atomic clocks. By searching for coherent variations in the recorded clock frequency comparisons across the network, we signif
Externí odkaz:
http://arxiv.org/abs/1907.02661
Autor:
Delva, P., Lodewyck, J., Bilicki, S., Bookjans, E., Vallet, G., Targat, R. Le, Pottie, P. -E., Guerlin, C., Meynadier, F., Poncin-Lafitte, C. Le, Lopez, O., Amy-Klein, A., Lee, W. -K., Quintin, N., Lisdat, C., Al-Masoudi, A., Dörscher, S., Grebing, C., Grosche, G., Kuhl, A., Raupach, S., Sterr, U., Hill, I. R., Hobson, R., Bowden, W., Kronjäger, J., Marra, G., Rolland, A., Baynes, F. N., Margolis, H. S., Gill, P.
Publikováno v:
Phys. Rev. Lett. 118, 221102 (2017)
Phase compensated optical fiber links enable high accuracy atomic clocks separated by thousands of kilometers to be compared with unprecedented statistical resolution. By searching for a daily variation of the frequency difference between four stront
Externí odkaz:
http://arxiv.org/abs/1703.04426
Autor:
Keller, J., Hausser, H. N., Richter, I. M., Nordmann, T., Bhatt, N. M., Kiethe, J., Liu, H., Benkler, E., Lipphardt, B., Dörscher, S., Stahl, K., Klose, J., Lisdat, C., Filzinger, M., Huntemann, N., Peik, E., Mehlstäubler, T. E.
Publikováno v:
Journal of Physics: Conference Series; 2024, Vol. 2889 Issue 1, p1-7, 7p
Akademický článek
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Autor:
Koller, S. B., Grotti, J., Vogt, St., Al-Masoudi, A., Dörscher, S., Häfner, S., Sterr, U., Lisdat, Ch.
Publikováno v:
Phys. Rev. Lett. 118, 073601 (2017)
We present a transportable optical clock (TOC) with $^{87}$Sr. Its complete characterization against a stationary lattice clock resulted in a systematic uncertainty of ${7.4 \times 10^{-17}}$ which is currently limited by the statistics of the determ
Externí odkaz:
http://arxiv.org/abs/1609.06183