Zobrazeno 1 - 10
of 815
pro vyhledávání: '"NIEMANN M."'
Autor:
Meiners, T., Coenders, J. -A., Mielke, J., Niemann, M., Cornejo, J. M., Ulmer, S., Ospelkaus, C.
High precision mass and $g$-factor measurements in Penning traps have enabled groundbreaking tests of fundamental physics. The most advanced setups use multi-trap methods, which employ transport of particles between specialized trap zones. Present de
Externí odkaz:
http://arxiv.org/abs/2309.06776
Autor:
Cornejo, J. M., Brombacher, J., Coenders, J. -A., von Boehn, M., Meiners, T., Niemann, M., Ulmer, S., Ospelkaus, C.
Publikováno v:
Phys. Rev. Research 5, 033226 (2023)
We demonstrate optical sideband spectroscopy of a single $^9$Be$^+$ ion in a cryogenic 5 Tesla Penning trap using two-photon stimulated-Raman transitions between the two Zeeman sublevels of the $1s^{2}2s$ ground state manifold. By applying two comple
Externí odkaz:
http://arxiv.org/abs/2308.09362
Autor:
Meiners, T., Niemann, M., Paschke, A. -G., Mielke, J., Idel, A., Borchert, M., Voges, K., Bautista-Salvador, A., Ulmer, S., Ospelkaus, C.
Publikováno v:
JPS Conf. Proc. 18, 011006 (2017)
We discuss laser-based and quantum logic inspired cooling and detection methods amenable to single (anti-)protons. These would be applicable e.g. in a g-factor based test of CPT invariance as currently pursued within the BASE collaboration. Towards t
Externí odkaz:
http://arxiv.org/abs/2107.08642
Autor:
Meiners, T., Niemann, M., Mielke, J., Borchert, M., Pulido, N., Cornejo, J. M., Ulmer, S., Ospelkaus, C.
Publikováno v:
Hyperfine Interactions volume 239, Article number: 26 (2018)
We present methods to manipulate and detect the motional state and the spin state of a single antiproton or proton which are currently under development within the BASE (Baryon Antibaryon Symmetry Experiment) collaboration. These methods include symp
Externí odkaz:
http://arxiv.org/abs/2107.08449
Autor:
Meiners, T., Niemann, M., Paschke, A. -G., Borchert, M., Idel, A., Mielke, J., Voges, K., Bautista-Salvador, A., Lehnert, R., Ulmer, S., Ospelkaus, C.
Publikováno v:
World Scientific, Singapore, Proceedings of the Seventh Meeting on CPT and Lorentz Symmetry (2017)
Current experimental efforts to test the fundamental CPT symmetry with single (anti-)protons are progressing at a rapid pace but are hurt by the nonzero temperature of particles and the difficulty of spin state detection. We describe a laser-based an
Externí odkaz:
http://arxiv.org/abs/2107.08435
Cryogenic Penning-Trap Apparatus for Precision Experiments with Sympathetically Cooled (anti)protons
Autor:
Niemann, M., Meiners, T., Mielke, J., Pulido, N., Schaper, J., Borchert, M. J., Cornejo, J. M., Paschke, A. -G., Zarantonello, G., Hahn, H., Lang, T., Manzoni, C., Marangoni, M., Cerullo, G., Morgner, U., Fenske, J. -A., Bautista-Salvador, A., Lehnert, R., Ulmer, S., Ospelkaus, C.
Publikováno v:
World Scientific, Singapore, Proceedings of the Eighth Meeting on CPT and Lorentz Symmetry (2020)
Current precision experiments with single (anti)protons to test CPT symmetry progress at a rapid pace, but are complicated by the need to cool particles to sub-thermal energies. We describe a cryogenic Penning-trap setup for $^9$Be$^+$ ions designed
Externí odkaz:
http://arxiv.org/abs/2107.08433
Dehmelt and VanDyck's famous 1987 measurement of the electron and positron g-factor is still the most precise g-factor comparison in the lepton sector, and a sensitive test of possible CPT violation. A complementary g-factor comparison between the pr
Externí odkaz:
http://arxiv.org/abs/2107.08438
Publikováno v:
In Powder Technology 15 April 2024 439
Autor:
Smorra, C., Blaum, K., Bojtar, L., Borchert, M., Franke, K. A., Higuchi, T., Leefer, N., Nagahama, H., Matsuda, Y., Mooser, A., Niemann, M., Ospelkaus, C., Quint, W., Schneider, G., Sellner, S., Tanaka, T., Van Gorp, S., Walz, J., Yamazaki, Y., Ulmer, S.
Publikováno v:
The European Physical Journal Special Topics November 2015, Volume 224, Issue 16, pp 3055-3108
The Baryon Antibaryon Symmetry Experiment (BASE) aims at performing a stringent test of the combined charge parity and time reversal (CPT) symmetry by comparing the magnetic moments of the proton and the antiproton with high precision. Using single p
Externí odkaz:
http://arxiv.org/abs/1604.08820