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Prof. Dr.  Christian Ospelkaus

https://orcid.org/0000-0002-4170-2936
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Publications

  1. 2025
  2. Published

    Speeding up adiabatic ion transport in macroscopic multi-Penning-trap stacks for high-precision experiments

    von Boehn, M., Schaper, J., Coenders, J. A., Brombacher, J., Meiners, T., Niemann, M., Cornejo, J. M., Ulmer, S. & Ospelkaus, C., 19 Mar 2025, In: Communications Physics. 8, 1, 107.

    Research output: Contribution to journal › Article › Research › peer review

  3. 2024
  4. Published

    A Direct Digital Synthesizer-Based Arbitrary Waveform Generator for Envelope Modulation in Trapped-Ion Quantum Computer Operating at 4K

    Eugine, P. S., Toth, P., Yamashita, K., Halama, S., Ospelkaus, C., Ishikuro, H. & Issakov, V., 27 Oct 2024, IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium: BCICTS 2024. Institute of Electrical and Electronics Engineers Inc., p. 50-53 4 p.

    Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

  5. Published

    Resolved-sideband cooling of a single Be + 9 ion in a cryogenic multi-Penning-trap for discrete symmetry tests with (anti-)protons

    Cornejo, J. M., Brombacher, J., Coenders, J. A., Von Boehn, M., Meiners, T., Niemann, M., Ulmer, S. & Ospelkaus, C., 3 Sept 2024, In: Physical Review Research. 6, 3, 033233.

    Research output: Contribution to journal › Article › Research › peer review

  6. Published

    Orders of Magnitude Improved Cyclotron-Mode Cooling for Nondestructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons

    BASE Collaboration, B. C., 1 Aug 2024, In: Physical review letters. 133, 5, 6 p., 053201.

    Research output: Contribution to journal › Article › Research › peer review

  7. Published

    A Fully Integrated Three-Channel Cryogenic Microwave SoC for Qubit State Control in 9Be+Trapped-Ion Quantum Computer operating at 4 K

    Toth, P., Eugine, P. S., Meyer, A., Yamashita, K., Halama, S., Duwe, M., Ishikuro, H., Ospelkaus, C. & Issakov, V., 24 Jul 2024, 2024 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2024. Institute of Electrical and Electronics Engineers Inc., p. 239-242 4 p. (Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium).

    Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

  8. Published

    Image-Current Mediated Sympathetic Laser Cooling of a Single Proton in a Penning Trap Down to 170 mK Axial Temperature

    BASE Collaboration, B. C., 12 Jul 2024, In: Physical review letters. 133, 2, 6 p., 023002.

    Research output: Contribution to journal › Article › Research › peer review

  9. Published

    Arbitrary quantum circuits on a fully integrated two-qubit computation register for a trapped-ion quantum processor

    Pulido-Mateo, N., Mendpara, H., Duwe, M., Dubielzig, T., Zarantonello, G., Krinner, L. & Ospelkaus, C., 24 Jun 2024, In: Physical Review Research. 6, 2, 7 p., L022067.

    Research output: Contribution to journal › Letter › Research › peer review

  10. Published

    Penning micro-trap for quantum computing

    Jain, S., Sägesser, T., Hrmo, P., Torkzaban, C., Stadler, M., Oswald, R., Axline, C., Bautista-Salvador, A., Ospelkaus, C., Kienzler, D. & Home, J., 21 Mar 2024, In: NATURE. 627, p. 510-514 5 p.

    Research output: Contribution to journal › Article › Research › peer review

  11. Published

    Fast adiabatic transport of single laser-cooled 9Be+ ions in a cryogenic Penning trap stack

    Meiners, T., Coenders, J. A., Brombacher, J., Niemann, M., Cornejo, J. M., Ulmer, S. & Ospelkaus, C., 15 Mar 2024, In: European Physical Journal Plus. 139, 3, 10 p., 262.

    Research output: Contribution to journal › Article › Research › peer review

  12. E-pub ahead of print

    Matching Network for a High Fidelity Microwave Surface-Electrode in a Trapped-Ion Quantum Processors

    Hoffmann, A., Ungerechts, P. F., Munoz Carpio, R. A., Bätge, J., Meiners, T., Kaune, B. I. E. & Ospelkaus, C., 15 Mar 2024, (E-pub ahead of print).

    Research output: Contribution to conference › Abstract › Research

  13. 2023
  14. Published

    BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies

    Smorra, C., Abbass, F., Schweitzer, D., Bohman, M., Devine, J. D., Dutheil, Y., Hobl, A., Arndt, B., Bauer, B. B., Devlin, J. A., Erlewein, S., Fleck, M., Jäger, J. I., Latacz, B. M., 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., Nov 2023, In: Review of scientific instruments. 94, 11, 18 p., 113201.

    Research output: Contribution to journal › Article › Research › peer review

  15. Published

    Ultra-thin polymer foil cryogenic window for antiproton deceleration and storage

    Latacz, B. M., Arndt, B. P., Devlin, J. A., Erlewein, S. R., Fleck, M., Jäger, J. I., 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., Oct 2023, In: Review of scientific instruments. 94, 10, 12 p., 103310.

    Research output: Contribution to journal › Article › Research › peer review

  16. Published

    Optical stimulated-Raman sideband spectroscopy of a single ^9Be^+ ion in a Penning trap

    Cornejo, J. M., Brombacher, J., Coenders, J. A., Von Boehn, M., Meiners, T., Niemann, M., Ulmer, S. & Ospelkaus, C., 28 Sept 2023, In: Physical Review Research. 5, 3, 6 p., 033226.

    Research output: Contribution to journal › Article › Research › peer review

  17. Published

    BASE—high-precision comparisons of the fundamental properties of protons and antiprotons

    Latacz, B. M., Arndt, B. P., Bauer, B. B., Devlin, J. A., Erlewein, S. R., Fleck, M., Jäger, J. I., Schiffelholz, M., Umbrazunas, G., Wursten, E. J., 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., 5 Jun 2023, In: European Physical Journal D. 77, 6, 94.

    Research output: Contribution to journal › Article › Research › peer review

  18. Published

    Near Field Modeling for Quantum Gate Operation

    Hoffmann, A., Ungerechts, P. F., Munoz Carpio, R. A., Kaune, B. I. E., Meiners, T., Ospelkaus, C. & Manteuffel, D., 2023, DPG-Frühjahrstagung 2023: of the Atomic, Molecular, Quantum Optics and Photonics Section (SAMOP). Bad Honnef, p. 242-242 QI 23.40. (Verhandlungen der Deutschen Physikalischen Gesellschaft; vol. 58).

    Research output: Chapter in book/report/conference proceeding › Conference abstract › Research

  19. Published

    Optimization methods for RF junctions in register-based surface-electrode ion traps

    Ungerechts, P. F., Munoz Carpio, R. A., Hoffmann, A., Kaune, B. I. E., Meiners, T. & Ospelkaus, C., 2023, DPG-Frühjahrstagung 2023: of the Atomic, Molecular, Quantum Optics and Photonics Section (SAMOP). Bad Honnef, p. 170-170 Q 28.2. (Verhandlungen der Deutschen Physikalischen Gesellschaft; vol. 58).

    Research output: Chapter in book/report/conference proceeding › Conference abstract › Research

  20. Published

    Real-time hybrid quantum-classical computations for trapped ions with Python control-flow

    Schmale, T., Temesi, B., Trittschanke, N., Pulido-Mateo, N., Elenskiy, I., Krinner, L., Dubielzig, T., Ospelkaus, C., Weimer, H. & Borcherding, D., 2023, 2023 IEEE International Conference on Quantum Software: QSW 2023. Ali, S., Ardagna, C., Atukorala, N., Barzen, J., Chang, C. K., Chang, R. N., Fan, J., Faro, I., Feld, S., Fox, G. C., Jin, Z., Leymann, F., Neukart, F., de la Puente, S. & Wimmer, M. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 193-199 7 p.

    Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

  21. Published

    Testing CPT Invariance by High-Precision Comparisons of Fundamental Properties of Protons and Antiprotons at BASE

    Wursten, E. J., Borchert, M. J., Devlin, J. A., Erlewein, S. R., Fleck, M., Harrington, J. A., Jäger, J. I., Latacz, B. M., Micke, P., Umbrazunas, G., Abbass, F., Bohman, M., Kommu, S., Popper, D., Wiesinger, M., Will, C., Yildiz, H., Blaum, K., Matsuda, Y., Mooser, A., Ospelkaus, C., Soter, A., Quint, W., Walz, J., Yamazaki, Y., Smorra, C. & Ulmer, S., 2023, Proceedings of the 9th Meeting on CPT and Lorentz Symmetry: CPT 2022. Lehnert, R. (ed.). World Scientific Publishing Co. Pte Ltd, 5 p.

    Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

  22. Published

    Towards Resolved Sideband Laser Cooling of Single 9Be+ Ions in a Penning Trap for Precision Experiments with (Anti-)Protons

    Cornejo, J. M., Coenders, J. A., Niemann, M., Meiners, T., Mielke, J., Bautista-Salvador, A., Lehnert, R., Ulmer, S. & Ospelkaus, C., 2023, Proceedings of the 9th Meeting on CPT and Lorentz Symmetry, CPT 2022. Lehnert, R. (ed.). World Scientific Publishing Co. Pte Ltd, p. 124-127 4 p.

    Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

  23. Published

    Transport waveforms for through-junction ion transport on surface-electrode ion traps for a QCCD architecture

    Munoz Carpio, R. A., Ungerechts, P. F., Hoffmann, A., Kaune, B. I. E., Meiners, T. & Ospelkaus, C., 2023, DPG-Frühjahrstagung 2023: of the Atomic, Molecular, Quantum Optics and Photonics Section (SAMOP). Bad Honnef, p. 245-245 QI 23.61. (Verhandlungen der Deutschen Physikalischen Gesellschaft; vol. 58).

    Research output: Chapter in book/report/conference proceeding › Conference abstract › Research

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