2026
Toth, P, Shine Eugine, P, Kudabay, Y, Yamashita, K, Halama, S, Parvizinejad, J, Bonkowski, M, Ishikuro, H, Ospelkaus, C & Issakov, V 2026, 'A Cryo-BiCMOS Controller for Quantum Computers based on Trapped Beryllium Ions', IEEE Journal of Solid-State Circuits, vol. 61, no. 2, pp. 673-689. https://doi.org/10.1109/JSSC.2025.3632204
2025
Krishnakumar, N, Giebel, F, Iseke, E, Thronberens, K, Stupp, J, Stahr, ND, Munoz, R, Kaune, B, Meiners, T, Krinner, L & Ospelkaus, C 2025, 'Microfabrication of an 8-qubit processor chip for a trapped-ion quantum computer demonstrator', Micro and Nano Engineering, vol. 29, 100336. https://doi.org/10.1016/j.mne.2025.100336
Latacz, BM, Erlewein, SR, Fleck, M, Jäger, JI, Abbass, F, Arndt, BP, Geissler, P, Imamura, T, Leonhardt, M, Micke, P, Mooser, A, Schweitzer, D, Voelksen, F, Wursten, E, Yildiz, H, Blaum, K, Devlin, JA, Matsuda, Y, Ospelkaus, C, Quint, W, Soter, A, Walz, J, Yamazaki, Y, Smorra, C & Ulmer, S 2025, 'Coherent spectroscopy with a single antiproton spin', NATURE, vol. 644, no. 8075, pp. 64-68. https://doi.org/10.1038/s41586-025-09323-1
Leonhardt, M, Schweitzer, D, Abbass, F, Anjum, KK, Arndt, B, Erlewein, S, Endoh, S, Geissler, P, Imamura, T, Jäger, JI, Latacz, BM, Micke, P, Voelksen, F, Yildiz, H, Blaum, K, Devlin, JA, Matsuda, Y, Ospelkaus, C, Quint, W, Soter, A, Walz, J, Yamazaki, Y, Ulmer, S & Smorra, C 2025, 'Proton transport from the antimatter factory of CERN', NATURE, vol. 641, pp. 871-875. https://doi.org/10.1038/s41586-025-08926-y
von Boehn, M, Schaper, J, Coenders, JA, Brombacher, J, Meiners, T, Niemann, M, Cornejo, JM, Ulmer, S & Ospelkaus, C 2025, 'Speeding up adiabatic ion transport in macroscopic multi-Penning-trap stacks for high-precision experiments', Communications Physics, vol. 8, no. 1, 107. https://doi.org/10.1038/s42005-025-02031-2
2024
Cornejo, JM, Brombacher, J, Coenders, JA, Von Boehn, M, Meiners, T, Niemann, M, Ulmer, S & Ospelkaus, C 2024, 'Resolved-sideband cooling of a single Be + 9 ion in a cryogenic multi-Penning-trap for discrete symmetry tests with (anti-)protons', Physical Review Research, vol. 6, no. 3, 033233. https://doi.org/10.1103/PhysRevResearch.6.033233
BASE Collaboration 2024, 'Orders of Magnitude Improved Cyclotron-Mode Cooling for Nondestructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons', Physical review letters, vol. 133, no. 5, 053201. https://doi.org/10.1103/PhysRevLett.133.053201
BASE Collaboration 2024, 'Image-Current Mediated Sympathetic Laser Cooling of a Single Proton in a Penning Trap Down to 170 mK Axial Temperature', Physical review letters, vol. 133, no. 2, 023002. https://doi.org/10.1103/PhysRevLett.133.023002, https://doi.org/10.48550/arXiv.2310.10208
Pulido-Mateo, N, Mendpara, H, Duwe, M, Dubielzig, T, Zarantonello, G, Krinner, L & Ospelkaus, C 2024, 'Arbitrary quantum circuits on a fully integrated two-qubit computation register for a trapped-ion quantum processor', Physical Review Research, vol. 6, no. 2, L022067. https://doi.org/10.48550/arXiv.2403.19809, https://doi.org/10.1103/PhysRevResearch.6.L022067
Jain, S, Sägesser, T, Hrmo, P, Torkzaban, C, Stadler, M, Oswald, R, Axline, C, Bautista-Salvador, A, Ospelkaus, C, Kienzler, D & Home, J 2024, 'Penning micro-trap for quantum computing', NATURE, vol. 627, pp. 510-514. https://doi.org/10.48550/arXiv.2308.07672, https://doi.org/10.1038/s41586-024-07111-x
Meiners, T, Coenders, JA, Brombacher, J, Niemann, M, Cornejo, JM, Ulmer, S & Ospelkaus, C 2024, 'Fast adiabatic transport of single laser-cooled 9Be+ ions in a cryogenic Penning trap stack', European Physical Journal Plus, vol. 139, no. 3, 262. https://doi.org/10.48550/arXiv.2309.06776, https://doi.org/10.1140/epjp/s13360-024-04936-3
2023
Smorra, C, Abbass, F, Schweitzer, D, Bohman, M, Devine, JD, Dutheil, Y, Hobl, A, Arndt, B, Bauer, BB, Devlin, JA, Erlewein, S, Fleck, M, Jäger, JI, Latacz, BM, Micke, P, Schiffelholz, M, Umbrazunas, G, Wiesinger, M, Will, C, Wursten, E, Yildiz, H, Blaum, K, Matsuda, Y, Mooser, A, Ospelkaus, C, Quint, W, Soter, A, Walz, J, Yamazaki, Y & Ulmer, S 2023, 'BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies', Review of scientific instruments, vol. 94, no. 11, 113201. https://doi.org/10.1063/5.0155492, https://doi.org/10.48550/arXiv.2304.09555
Latacz, BM, Arndt, BP, Devlin, JA, Erlewein, SR, Fleck, M, Jäger, JI, Micke, P, Umbrazunas, G, Wursten, E, Abbass, F, Schweitzer, D, Wiesinger, M, Will, C, Yildiz, H, Blaum, K, Matsuda, Y, Mooser, A, Ospelkaus, C, Smorra, C, Sótér, A, Quint, W, Walz, J, Yamazaki, Y & Ulmer, S 2023, 'Ultra-thin polymer foil cryogenic window for antiproton deceleration and storage', Review of scientific instruments, vol. 94, no. 10, 103310. https://doi.org/10.48550/arXiv.2308.1287, https://doi.org/10.1063/5.0167262
Cornejo, JM, Brombacher, J, Coenders, JA, Von Boehn, M, Meiners, T, Niemann, M, Ulmer, S & Ospelkaus, C 2023, 'Optical stimulated-Raman sideband spectroscopy of a single ^9Be^+ ion in a Penning trap', Physical Review Research, vol. 5, no. 3, 033226. https://doi.org/10.48550/arXiv.2308.09362, https://doi.org/10.1103/PhysRevResearch.5.033226
Latacz, BM, Arndt, BP, Bauer, BB, Devlin, JA, Erlewein, SR, Fleck, M, Jäger, JI, Schiffelholz, M, Umbrazunas, G, Wursten, EJ, Abbass, F, Micke, P, Popper, D, Wiesinger, M, Will, C, Yildiz, H, Blaum, K, Matsuda, Y, Mooser, A, Ospelkaus, C, Quint, W, Soter, A, Walz, J, Yamazaki, Y, Smorra, C & Ulmer, S 2023, 'BASE—high-precision comparisons of the fundamental properties of protons and antiprotons', European Physical Journal D, vol. 77, no. 6, 94. https://doi.org/10.1140/epjd/s10053-023-00672-y
2022
Duwe, M, Zarantonello, G, Pulido-Mateo, N, Mendpara, H, Krinner, L, Bautista-Salvador, A, Vitanov, NV, Hammerer, K, Werner, RF & Ospelkaus, C 2022, 'Numerical optimization of amplitude-modulated pulses in microwave-driven entanglement generation', Quantum Science and Technology, vol. 7, no. 4, 045005. https://doi.org/10.48550/arXiv.2112.07714, https://doi.org/10.1088/2058-9565/ac7b41
Schubert, M, Kilzer, L, Dubielzig, T, Schilling, M, Ospelkaus, C & Hampel, B 2022, 'Active impedance matching of a cryogenic radio frequency resonator for ion traps', Review of scientific instruments, vol. 93, no. 9, 093201. https://doi.org/10.1063/5.0097583
Völksen, F, Devlin, JA, Borchert, MJ, Erlewein, SR, Fleck, M, Jäger, JI, Latacz, BM, Micke, P, Nuschke, P, Umbrazunas, G, Wursten, EJ, Abbass, F, Bohman, MA, Popper, D, Wiesinger, M, Will, C, Blaum, K, Matsuda, Y, Mooser, A, Ospelkaus, C, Smorra, C, Soter, A, Quint, W, Walz, J, Yamazaki, Y & Ulmer, S 2022, 'A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range > 180 kHz', Review of scientific instruments, vol. 93, no. 9, 093303. https://doi.org/10.1063/5.0089182
Berrocal, J, Altozano, E, Domínguez, F, Gutiérrez, MJ, Cerrillo, J, Fernández, FJ, Block, M, Ospelkaus, C & Rodríguez, D 2022, 'Formation of two-ion crystals by injection from a Paul-trap source into a high-magnetic-field Penning trap', Physical Review A, vol. 105, no. 5, 052604. https://doi.org/10.48550/arXiv.2203.16933, https://doi.org/10.1103/PhysRevA.105.052603
Will, C, Bohman, M, Driscoll, T, Wiesinger, M, Abbass, F, Borchert, MJ, Devlin, JA, Erlewein, S, Fleck, M, Latacz, B, Moller, R, Mooser, A, Popper, D, Wursten, E, Blaum, K, Matsuda, Y, Ospelkaus, C, Quint, W, Walz, J, Smorra, C & Ulmer, S 2022, 'Sympathetic cooling schemes for separately trapped ions coupled via image currents', New journal of physics, vol. 24, no. 3, 033021. https://doi.org/10.48550/arXiv.2112.04818, https://doi.org/10.1088/1367-2630/ac55b3
