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2024 Orders of Magnitude Improved Cyclotron-Mode Cooling for Non-Destructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons 
  BM Latacz, M Fleck, JI Jaeger, G Umbrazunas, BP Arndt, SR Erlewein, ...
  arXiv preprint arXiv:2404.07928, (accepted Phys. Rev. Lett.) 2024
   
  Image-current mediated sympathetic laser cooling of a single proton in a Penning trap down to 170 mK axial temperature 
  C. Will, M. Wiesinger, P. Micke, H. Yildiz, T. Driscoll, S. Kommu, F. Abbass, B. P. Arndt, B. B. Bauer, S. Erlewein, M. Fleck, J. I. Jäger, B. M. Latacz, A. Mooser, D. Schweitzer, G. Umbrazunas, E. Wursten, K. Blaum, J. A. Devlin, C. Ospelkaus, W. Quint, A. Soter, J. Walz, C. Smorra, S. Ulmer
  arXiv preprint arXiv:2310.10208, (accepted Phys. Rev. Lett.) 2024
   
  Terrestrial very-long-baseline atom interferometry: Workshop summary
 

S Abend, B Allard, I Alonso, J Antoniadis, H Araújo, G Arduini, AS Arnold, ...

  AVS Quantum Science 6 (2), 2024
   
2022  A High-Q Superconducting Toroidal Medium Frequency Detection System with a Capacitively Adjustable Frequency Range  >180 kHz. 
  F. Voelksen, M. J. Borchert, J. A. Devlin, S. Erlewein, M. Fleck, J. A. Harrington, B. Latacz, E. Wursten, A. H. Mooser, M. A. Bohman, V. Grunhofer, C. Smorra, M. Wiesinger, C. Will, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, S. Ulmer
  Review of Scientific Instruments (akzeptiert, 2022)
   
  Direct Measurement of the 3He magnetic moments
  A. Schneider, B. Sikora, S. Dickopf, M. Müller, N. S. Oreshkina, A. Rischka, I. A. Valuev,
S. Ulmer, J. Walz, Z. Harman, C. H. Keitel, A. Mooser & K. Blaum
  Nature 606, 878 (2022)
   
  Millicharged Dark Matter Detection with Ion Traps
  D. Budker, P. W. Graham, H. Ramani, F. Schmidt-Kaler, C. Smorra, and S. Ulmer
  PRX-Quantum 3, 010330 (2022).
   
  A 16 parts-per-trillion measurement of the antiproton-to-proton charge-mass ratio
  M. J. Borchert, J. A. Devlin, S. Erlewein, M. Fleck, J. A. Harrington, B. Latacz, E. Wursten, A. H. Mooser, M. A. Bohman, V. Grunhofer, C. Smorra, M. Wiesinger, C. Will, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, S. Ulmer
  Nature 601, 53 (2022)
   
2021   LC circuit mediated sympathetic cooling of a proton via image currents
  M. A. Bohman, V. Grunhofer, C. Smorra, M. Wiesinger, C. Will, M. J. Borchert, J. A. Devlin, S. Erlewein, M. Fleck, J. A. Harrington, B. Latacz, E. Wursten, A. H. Mooser, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, S. Ulmer
  Nature 596, 514 (2021)
   
  Quantum logic inspired techniques for spacetime-symmetry tests with (anti-)protons
  J. M. Cornejo, R. Lehnert, M. Niemann, J. Mielke, T. Meiners, A. Bautista-Salvador, M. Schulte, D. Nitzschke, M. J. Borchert, K. Hammerer, S. Ulmer, C. Ospelkaus
  New Journal of Physics 23, 073045 (2021)
   
  Constraints on the coupling between axion-like dark matter and photons using an antiproton superconducting tuned detection circuit in a cryogenic Penning trap
  J. A. Devlin, M. J. Borchert, S. Erlewein, M. Fleck, J. A. Harrington, B. Latacz, J. Warncke, E. Wursten, M. A. Bohman, A. H. Mooser, C. Smorra, M. Wiesinger, C. Will, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, S. Ulmer
  Phys. Rev. Lett. 126, 041301 (2021)
   
  Measurement of the Principal Quantum Number Distribution in a Beam of Antihydrogen Atoms
  B. Kolbinger et al. (ASACUSA collaboration)
  EPJD 75, 91 (2021)
   
2020 Detection of Metastable Electronic States by Penning Trap Mass Spectrometry
  R. X. Schüssler, H. Bekker,, M. Braß, H. Cakir, J. R. Crespo López-Urrutia, M. Door, P. Filianin, Z. Harman, M. W. Haverkort, W. J. Huang, P. Indelicato, C. H. Keitel, C. M. König,  K. Kromer, M. Müller, Y. N. Novikov, A. Rischka, C. Schweiger, S. Sturm, S. Ulmer, S. Eliseev, K. Blaum
  Nature 581, 64 (2020)
   
  Elementary Laser-Less Quantum Logic Operations with Single (Anti-)Protons in Penning Traps
  M. Niemann, T. Meiners, J. Mielke, M. J. Borchert, J. M. Cornejo, S. Ulmer and C. Ospelkaus
  Advanced Quantum Technologies 3, 1900133 (2020)
   
2019 Cryogenic Be+ Penning Trap for Precision Measurements with Antiprotons
  M. Niemann, T. Meiners, J. Mielke, M. J. Borchert, J. M. Cornejo, S. Ulmer and C. Ospelkaus
  Measurement Science and Technology 31, 035003 (2019)
   
  Direct Limits on the Interaction of Antiprotons with Axion-Like Dark Matter
  C. Smorra, Y. Stadnik, M. Bohman, M. J. Borchert, S. Erlewein, J. A. Harrington, J. A. Devlin, P.E. Blessing, T. Higuchi, M. Wiesinger, G. Schneider, A. Mooser, K. Blaum, Y. Matsuda, W. Quint, J. Walz, D. Budker, and S. Ulmer
  Nature 575, 310 (2019)
   
  Measurement of Ultra-Low Heating Rates in a Cryogenic Penning Trap
  M. J. Borchert, P.E. Blessing, J.A. Devlin, J. A. Harrington, T. Higuchi, J. Morgner, E. Wursten, M. Bohman, M. Wiesinger, C. Smorra, K. Blaum, Y. Matsuda, W. Quint, J. Walz, and S. Ulmer
  Phys. Rev. Lett. 122, 043201 (2019)
   
  A Novel Penning Trap Design for the High Precision Measurement of the 3He2+ Nuclear Magnetic Moment
  A. Schneider, A. Mooser, A. Rischka, K. Blaum, S. Ulmer, J. Walz
  Ann. Phys. (Berlin) 531, 1800485 (2019) 
   
  Superconducting Solenoid System with Adjustable Shielding Factor for Precision measurements of the Properties of the Antiprotons  
  J.A. Devlin, E. Wursten, J. A. Harrington, M. J. Borchert, P.E. Blessing, T. Higuchi, J. Morgner, M. Bohman, M. Wiesinger, C. Smorra, K. Blaum, Y. Matsuda, W. Quint, J. Walz, and S. Ulmer
  Phys. Rev. Appl. 12, 044012 (2019)
   
2018 Challenging the Standard Model by high precision comparisons of the fundamental properties of protons and antiprotons
  S. Ulmer, A. Mooser, H. Nagahama, S. Sellner, C. Smorra
  Phil.Trans.R.Soc.A 376, 20170275 (2017)
   
  The ASACUSA antihydrogen and hydrogen program: results and prospects
  C. Malbrunot, et. al. (ASACUSA collaboration)
  Phil. Trans. R. Soc. A 376: 20170273
   
  Imaging antimatter with a Micromegas detector
  V. Mäckel et al. (ASACUSA collaboration)
  Nucl. Instrum. Meth. B 422, 1 (2018)
   
2017 Sympathetic cooling of protons and antiprotons with a common endcap Penning trap
  M. Bohman, G. Schneider, A. Mooser, N. Schön, J. Harrington, T. Higuchi, H. Nagahama, S. Sellner, C. Smorra, K. Blaum, Y. Matsuda, W. Quint, J. Walz, S. Ulmer
  Journ. Mod. Opt. DOI: 10.1080/09500340.2017.1404656 (2017)
   
  Double-trap measurement of the proton magnetic moment at 0.3 parts per billion precision
  G. Schneider, A. Mooser, M. Bohman, N. Schön, J. Harrington, T. Higuchi, H. Nagahama, S. Sellner, C. Smorra, K. Blaum, Y. Matsuda, W. Quint, J. Walz, S. Ulmer
  Science 358, 1081 (2017)
   
  A parts-per-billion measurement of the antiproton magnetic moment
  C. Smorra, S. Sellner, M. J. Borchert, J. A. Harrington, T. Higuchi, H. Nagahama, T. Tanaka, A. Mooser, G. Schneider, M. Bohman, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki and S. Ulmer
  Nature 550, 371-374 (2017)
   
  Improved limit on the directly measured antiproton lifetime
  S. Sellner, M. Besirli, M. Bohman, M.J. Borchert, J. Harrington, T. Higuchi, A. Mooser, H. Nagahama, G. Schneider, C. Smorra, T. Tanaka, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki and S. Ulmer
  New J. Phys. 19 083023 (2017)
   
  High-Precision Measurement of the Proton’s Atomic Mass
  F. Heiße, F. Köhler-Langes, S. Rau, J. Hou, S. Junck, A. Kracke, A. Mooser, W. Quint, S. Ulmer, G. Werth, K. Blaum, and S. Sturm
  Phys. Rev. Lett. 119, 033001 (2017)
   
  Observation of individual spin quantum transitions of a single antiproton
  C. Smorra, A. Mooser, M. Besirli, M. Bohman, M. J. Borchert, J. Harrington, T. Higuchi, H. Nagahama, T. Tanaka, S. Sellner, G. Schneider, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, and S. Ulmer
  Phys. Lett. B 769, 1 (2017)
   
  Optical transition seen in antihydrogen
  S. Ulmer
  Nature 541, 467 (2017)
   
  Sixfold improved single particle measurement of the magnetic moment of the antiproton
  H. Nagahama, C. Smorra, S. Sellner, J. Harrington, T. Higuchi, M. J. Borchert, T. Tanaka, M. Besirli, A. Mooser, G. Schneider, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, and S. Ulmer
  Nat. Commun. 8 14084 (2017)
   
2016 Highly sensitive superconducting circuits at 700 kHz with tunable quality factors for image-current detection of single trapped antiprotons.
  H. Nagahama, G. Schneider, A. Mooser, M. Besirli, M. J. Borchert, K. Blaum, J. Harrington, T. Higuchi, Y. Matsuda, C. Ospelkaus, W. Quint, S. Sellner, C. Smorra, T. Tanaka, J. Walz, Y. Yamazaki, and S. Ulmer
  Rev. Sci. Instrum. 87 113305 (2016)
   
2015 The ASACUSA-CUSP, an antihydrogen experiment
  N. Kuroda et al.
  DOI 10.1007/s10751-015-1205-1
   
  High-precision comparison of the antiproton-to-proton charge-to-mass ratio
  S. Ulmer, C. Smorra, A. Mooser, K. Franke, H. Nagahama, G. Schneider, T. Higuchi, S. Van Gorp, K. Blaum, Y. Matsuda, W. Quint, J. Walz, Y. Yamazaki
  Nature 524, 196 (2015)
   
  BASE - The Baryon Antibaryon Symmetry Experiment
  C. Smorra, K. Blaum, L. Bojtar, M. Borchert, K. A. Franke, T. Higuchi, N. Leefer, H. Nagahama, Y. Matsuda, A. Mooser, M. Niemann, C. Ospelkaus, W. Quint, G. Schneider, S. Sellner, T. Tanaka, S. Van Gorp, J. Walz, Y. Yamazaki, S. Ulmer
  Eur. Phys. J. Special Topics 224, 3055 (2015)
   
  Das magnetische Moment des Protons
  A. Mooser, C. Smorra, S. Ulmer
  PhiuZ 46, 92 (2015)
   
  A reservoir trap for antiprotons
  C. Smorra, A. Mooser, K. Franke, H. Nagahama, G. Schneider, T. Higuchi, S. V. Gorp, K. Blaum, Y. Matsuda, W. Quint, J. Walz, Y. Yamazaki, S. Ulmer
  Int. J. Mass. Spectrom. 389, 10 (2015)
   
  The development of the antihydrogen beam detector and the detection of the antihydrogen atoms for in-flight hyperfine spectroscopy
  Y. Nagata et al.
  Journ. Phys. Conf. Ser. 635, 022061 (2015)
   
  Precise Tests of Fundamental Symmetries with Exotic Particles in Penning Traps
  S. Ulmer, W. Quint and K. Blaum
  World Scientific Books, Lecture Notes (2015)
   
2014 Towards a high-precision measurement of the antiproton magnetic moment
  C. Smorra, K. Blaum, K. Franke, Y. Matsuda, A. Mooser, H. Nagahama, C. Ospelkaus, W. Quint, G. Schneider, S. Van Gorp, J. Walz, Y. Yamazaki, S. Ulmer
  Hyp. Int. 228, 31 (2014)
   
  Direct high-precision measurement of the magnetic moment of the proton
  A. Mooser, S. Ulmer, K. Blaum, K. Franke, H. Kracke, C. Leiteritz, W. Quint, C. C. Rodegheri, C. Smorra, und J. Walz
  Nature 509, 596 (2014)
   
  The magnetic moments of the proton and the antiproton
  S. Ulmer, A. Mooser, K. Blaum, S. Braeuninger, K. Franke, H. Kracke, C. Leiteritz, Y. Matsuda, H. Nagahama, C. Ospelkaus, C. C. Rodegheri, W. Quint, G. Schneider, C. Smorra, S. Van Gorp, J. Walz und Y. Yamazaki
  J. Phys.: Conf. Ser. 488, 012033 (2014)
   
  A Source of Antihydrogen for In-Flight Hyperfine Spectroscopy
  N. Kuroda, S. Ulmer, D. J. Murtagh, S. Van Gorp, Y. Nagata, et al.
  Nature Communications  5, 3089 (2014) 
   
  The magnetic moments of the proton and the antiproton
  S. Ulmer and C. Smorra
  Book chapter in: PRECISION SPECTROSCOPY IN ION TRAPS FOR FUNDAMENTAL PHYSICS, Editors: W. Quint and M. Vogel (Springer 2014)
   
  Towards a spin polarized antihydrogen beam
  N. Kuroda et al.
  Hyperfine Interactions 228, 67 (2014)
   
2013 Demonstration of the double Penning trap technique with a single proton
  A. Mooser, S. Bräuninger, K. Franke, H. Kracke, C. Leiteritz, C.C. Rodegheri, H. Nagahama, G. Schneider, C. Smorra, K. Blaum, Y. Matsuda, W. Quint, J. Walz, Y. Yamazaki, S. Ulmer
  Phys. Lett. B 723, 78 (2013)
   
  Resolution of single spin flips of a single proton
  A. Mooser, H. Kracke, K. Blaum, S. A. Bräuninger, K. Franke, C. Leiteritz, W. Quint, C. C. Rodegheri, S. Ulmer, und J. Walz
  Phys. Rev. Lett. 110, 140405 (2013)
   
  A cryogenic detection system at 28.9 MHz for the non-destructive observation of a single proton at low particle energy
  S. Ulmer, K. Blaum, H. Kracke, A. Mooser, W. Quint, C.C. Rodegheri, J. Walz
  Nucl. Instrum. Methods A 705, 55 (2013)
   
  CPT symmetry tests with cold antiprotons and antihydrogen
  Y. Yamazaki and S. Ulmer
  Ann. d. Phys. 525, 493 (2013)
   
  Resolution of Single Spin-Flips of a Single Proton
  A. Mooser, H. Kracke, K. Blaum, S. A. Braeuninger, K. Franke, C. Leiteritz, W. Quint, C. C. Rodegheri, S. Ulmer, J. Walz
  Phys. Rev. Lett. 110, 140405 (2013)
   
  Measurement of the Hyperfine Structure of Antihydrogen in a Beam
  E. Widmann, M. Diermaier, B. Juhász, C. Malbrunot, O. Massiczek, C. SauerzopfK. Suzuki, B. Wünschek, J. Zmeskal, S. FedermannN. KurodaS. UlmerY. Yamazaki
  Hyp. Int. 215, 1 (2013)
   
2012 An experiment for the direct determination of the g-factor of a single proton in a Penning trap
  C. C. Rodegheri, K. Blaum, H. Kracke, S. Kreim, A. Mooser, W. Quint, S. Ulmer und J. Walz
  New J. Phys. 14, 063011 (2012)
   
2011 Direct measurement of the free cyclotron frequency of a single particle in a Penning trap
  S. Ulmer, K. Blaum, H. Kracke, A. Mooser, W. Quint, C. C. Rodegheri, und J. Walz
  Phys. Rev. Lett. 107, 103002 (2011)
   
  Observation of spin flips with a single trapped proton
  S. Ulmer, C. C. Rodegheri, K. Blaum, H. Kracke, A. Mooser, W. Quint, und J. Walz
  Phys. Rev. Lett. 106, 253001 (2011)
   
  Towards a direct measurement of the g-factor of a single isolated proton
  A. Mooser, K. Blaum, H. Kracke, S. Kreim, W. Quint, C. C. Rodeghéri, S. Ulmer, und J. Walz
  Can. J. Phys. 89, 165 (2011)
   
2009 The quality factor of a superconducting rf resonator in a magnetic field
  S. Ulmer, H. Kracke, K. Blaum, S. Kreim, A. Mooser, W. Quint, C. C. Rodegheri, und J. Walz
  Rev. Sci. Instrum. 80, 123302 (2009)
   
  Developments for the direct determination of the g-factor of a single proton in a Penning trap
  C. C. Rodegheri, K. Blaum, H. Kracke, S. Kreim, A. Mooser, C. Mrozik, W. Quint, S. Ulmer und J. Walz
  Hyp. Int. 194, 93 (2009)
   
  g-factor experiments on simple systems in Penning traps
  K. Blaum, H. Kracke, S. Kreim, A. Mooser, C. Mrozik, W. Quint, C. C. Rodegheri, B. Schabinger, S. Sturm, S. Ulmer, A. Wagner, J. Walz und G. Werth
  J. Phys. B: At. Mol. Opt. Phys. 42, 154021 (2009)
   
  Recent developments in ion detection techniques for Penning trap mass spectrometry at Triga-Trap
  J. Ketelaer, K. Blaum, M. Block, K. Eberhardt, M. Eibach, R. Ferrer, S. George, F. Herfurth, J. Ketter, Sz. Nagy, J. Repp, L. Schweikhard, C. Smorra, S. Sturm, and S. Ulmer
  Eur. Phys. J. A 42, 311–317 (2009)
   
  Older  Calculation of electrostatic fields using quasi-Green's functions: application to the hybrid Penning trap
  J. Verdú, S. Kreim, K. Blaum, H. Kracke, W. Quint, S. Ulmer, and J. Walz
  New J. Phys. 10, 103009-1 - 103009-23 (2008)
   
  Penning trap measurement of the magnetic moment of the antiproton
  J. Verdú, K. Blaum, S. Djekic, S. Kreim, W. Quint, S. Stahl, S. Ulmer, M. Vogel, J. Walz, G. Werth
  AIP Conference Proceedings 796, 260-265 (2005)
   
  Technical Documents
  BASE Letter of Intent, BASE Technical Design Report, BASE Annual Reports and BASE future proposal are found on CERN’s document server.
   
  BASE – Future Proposal
  S. Ulmer et al.
  CERN Document server: https://cds.cern.ch/record/2702758  (2019)
   
  This document contains the full future program of the BASE collaboration at CERN, which was approved by CERN’s SPSC committee in January 2020
   
  Technical Design Report BASE
  S. Ulmer et al.
  CERN Document server: http://cds.cern.ch/record/1503514  (2013)
   
  Letter of Intent: Direct high-precision measurement of the g-factor of a single antiproton stored in a cryogenic Penning trap
  S. Ulmer et al.
  CERN Document server: https://cds.cern.ch/record/1455847  (2012)
   
  Annual Progress Reports on BASE are available on the CERN Document Server
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