Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Koelemeij, J. C J"'
Autor:
Koelemeij, J. C. J., Dun, H., Diouf, C. E. V., Dierikx, E. F., Janssen, G. J. M., Tiberius, C. C. J. M.
Publikováno v:
Nature 611 (2022) 473-478
Global navigation satellite systems (GNSS) are widely used for navigation and time distribution, features indispensable for critical infrastructure such as mobile communication networks, as well as emerging technologies like automated driving and sus
Externí odkaz:
http://arxiv.org/abs/2305.14796
Autor:
Patra, Sayan, Germann, M., Karr, J. -Ph., Haidar, M., Hilico, L., Korobov, V. I., Cozijn, F. M. J., Eikema, K. S. E., Ubachs, W., Koelemeij, J. C. J.
Publikováno v:
Science 369, 1238-1241 (2020)
Accepted values of the masses of several subatomic particles have been under debate since recent measurements in Penning traps produced more precise yet incompatible results, implying possible inconsistencies in closely related physical constants lik
Externí odkaz:
http://arxiv.org/abs/2204.10674
Publikováno v:
Optics Express, Vol. 26, Issue 11, pp. 14650-14660 (2018)
We present a new measurement principle to determine the absolute time delay of a waveform from an optical reference plane to an electrical reference plane and vice versa. We demonstrate a method based on this principle with 2 ps uncertainty. This met
Externí odkaz:
http://arxiv.org/abs/1802.07567
We present a new derivation of the proton-electron mass ratio from the hydrogen molecular ion, HD$^+$. The derivation entails the adjustment of the mass ratio in highly precise theory so as to reproduce accurately measured ro-vibrational frequencies.
Externí odkaz:
http://arxiv.org/abs/1710.11537
Publikováno v:
Appl. Phys. B 123, 23 (2017)
Recently we reported a high precision optical frequency measurement of the (v,L):(0,2)->(8,3) vibrational overtone transition in trapped deuterated molecular hydrogen (HD+) ions at 10 mK temperature. Achieving a resolution of 0.85 parts-per-billion (
Externí odkaz:
http://arxiv.org/abs/1608.08976
Autor:
Patra, Sayan, Koelemeij, J. C. J.
Doppler broadening plays an important role in laser rovibrational spectroscopy of trapped deuterated molecular hydrogen ions (HD$^+$), even at the millikelvin temperatures achieved through sympathetic cooling by laser-cooled beryllium ions. Recently,
Externí odkaz:
http://arxiv.org/abs/1608.03130
Publikováno v:
Nature Communications 7, 10385 (2016)
The simplest molecules in nature, molecular hydrogen ions in the form of H2+ and HD+, provide an important benchmark system for tests of quantum electrodynamics in complex forms of matter. Here, we report on such a test based on a frequency measureme
Externí odkaz:
http://arxiv.org/abs/1602.01048
Autor:
Pinkert, T. J., Böll, O., Jansen, G. S. M., Dijck, E. A., Groeneveld, B. G. H. M., Smets, R., Bosveld, F. C., Ubachs, W., Jungmann, K., Eikema, K. S. E., Koelemeij, J. C. J.
Publikováno v:
Applied Optics, Vol. 54, Issue 4, pp. 728-738 (2015)
Results of optical frequency transfer over a carrier-grade dense-wavelength-division-multiplexing (DWDM) optical fibre network are presented. The relation between soil temperature changes on a buried optical fibre and frequency changes of an optical
Externí odkaz:
http://arxiv.org/abs/1410.4600
Publikováno v:
Opt. Express 21, 32643-32654 (2013)
We report a method to determine propagation delays of optical 10 Gb/s data traveling through a 75 km long amplified fiber link with an uncertainty of 4 ps. The one-way propagation delay is determined by two-way exchange and cross correlation of short
Externí odkaz:
http://arxiv.org/abs/1401.1305
Autor:
Salumbides, E. J., Koelemeij, J. C. J., Komasa, J., Pachucki, K., Eikema, K. S. E., Ubachs, W.
Highly accurate results from frequency measurements on neutral hydrogen molecules H_2, HD and D_2 as well as the HD^+ ion can be interpreted in terms of constraints on possible fifth-force interactions. Where the hydrogen atom is a probe for yet unkn
Externí odkaz:
http://arxiv.org/abs/1304.6560