A5007224500- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Molecular Physics
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle accelerators and beam dynamics
- Noncommutative and Quantum Gravity Theories
- Cosmology and Gravitation Theories
- Quantum, superfluid, helium dynamics
- Quantum Mechanics and Applications
- Particle Detector Development and Performance
- Scientific Measurement and Uncertainty Evaluation
- Particle Accelerators and Free-Electron Lasers
- Radioactive Decay and Measurement Techniques
- Physics of Superconductivity and Magnetism
- Nuclear physics research studies
- Quantum Information and Cryptography
- Nuclear Physics and Applications
- Superconducting and THz Device Technology
- Solar and Space Plasma Dynamics
- Mechanical and Optical Resonators
- Magnetic confinement fusion research
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Thermodynamics and Statistical Mechanics
RIKEN
2017-2023
Max Planck Institute for Nuclear Physics
2017-2023
National Institute of Standards and Technology
2022-2023
Argonne National Laboratory
2023
The magnetic moment of the antiproton is measured at parts-per-billion level, improving on previous measurements by a factor about 350. Comparing fundamental properties normal-matter particles with their antimatter counterparts tests charge–parity–time (CPT) invariance, which an important part standard model particle physics. Many have been to level uncertainty, but has not. Christian Smorra and colleagues now done so, report that it −2.7928473441 ± 0.0000000042 in units nuclear magneton....
Nailing down the proton magnetic moment Fundamental physical laws are believed to remain same if subjected three simultaneous transformations: flipping sign of electric charge, taking a mirror image, and running time backward. To test this parity, time-reversal (CPT) symmetry, it is desirable know fundamental properties particles such as high precision. Schneider et al. used double ion trap determine single trapped precision 0.3 parts per billion. Comparatively precise measurements quantity...
We constrain the coupling between axionlike particles (ALPs) and photons, measured with superconducting resonant detection circuit of a cryogenic Penning trap. By searching noise spectrum our fixed-frequency for peaks caused by dark matter ALPs converting into photons in strong magnetic field Penning-trap magnet, we are able to masses around $2.7906-2.7914\,\textrm{neV/c}^2$ $g_{a\gamma}< 1 \times 10^{-11}\,\textrm{GeV}^{-1}$. This is more than one order magnitude lower best laboratory...
Abstract Efficient cooling of trapped charged particles is essential to many fundamental physics experiments 1,2 , high-precision metrology 3,4 and quantum technology 5,6 . Until now, sympathetic has required close-range Coulomb interactions 7,8 but there been a sustained desire bring laser-cooling techniques in macroscopically separated traps 5,9,10 extending control previously inaccessible such as highly ions, molecular ions antimatter. Here we demonstrate single proton using laser-cooled...
Continuous monitoring of a cloud antiprotons stored in Penning trap for 405 days enables us to set an improved limit on the directly measured antiproton lifetime. From our measurements we extract storage time equivalent antiproton-seconds, resulting lower lifetime with confidence level . This result improves charge-parity-time violation decays based direct observation by factor 7.
Cooling of particles to mK-temperatures is essential for a variety experiments with trapped charged particles. However, many species interest lack suitable electronic transitions direct laser cooling. We study theoretically the remote sympathetic cooling single proton laser-cooled $^9$Be$^+$ in double-Penning-trap system. investigate three different schemes and find, based on analytical calculations numerical simulations, that two them are capable achieving temperatures about 10 mK times...
We present an experiment to sympathetically cool single protons and antiprotons in a Penning trap by resonantly coupling the particles laser cooled beryllium ions using common endcap technique. Our analysis shows that preparation of (anti)protons at mK temperatures on timescales tens seconds is feasible. Successful implementation technique will have immediate significant impact high-precision comparisons fundamental properties antiprotons. This turn provide stringent tests symmetries Standard Model.
We report on the detection of individual spin quantum transitions a single trapped antiproton in Penning trap. The spin-state determination, which is based unambiguous axial frequency shifts presence strong magnetic bottle, reaches fidelity 92.1%. Spin-state initialization with >99.9% and an average time 24 min are demonstrated. This major step towards moment measurement relative uncertainty part-per-billion level.
We report on the first detailed study of motional heating in a cryogenic Penning trap using single antiproton. Employing continuous Stern-Gerlach effect we observe cyclotron quantum transition rates 6(1) quanta/h and an electric field noise spectral density below $7.5(3.4)\times 10^{-20}\,\text{V}^{2}\text{m}^{-2} \text{Hz}^{-1}$, which corresponds to scaled $8.8(4.0)\times 10^{-12}\,\text{V}^{2}\text{m}^{-2}$, results are more than two orders magnitude smaller those reported by other ion...
Currently, the world's only source of low-energy antiprotons is AD/ELENA facility located at CERN. To date, all precision measurements on single have been conducted this and provide stringent tests fundamental interactions their symmetries. However, magnetic field fluctuations from operation limit upcoming measurements. overcome limitation, we designed transportable antiproton trap system BASE-STEP to relocate laboratories with a calm environment. We anticipate that will facilitate enhanced...
Divalent atoms and ions with a singlet $S$ ground state triplet $P$ excited form the basis of many high-precision optical atomic clocks. Along metastable $^{3}P_{\phantom{\rule{0.16em}{0ex}}0}$ clock state, these systems also have nearby $^{3}P_{\phantom{\rule{0.16em}{0ex}}2}$ state. We investigate properties electric quadrupole $^{1}{S}_{0}\ensuremath{\leftrightarrow}^{3}P_{\phantom{\rule{0.16em}{0ex}}2}$ transition focus on enhancing already existing In particular we...
In high-energy physics, Penning traps are used to make very precise mass measurements, determine fundamental constants, and test symmetries. Magnetic field noise limits trap performance, though. A superconducting self-shielding coil can reduce magnetic fluctuations, but technical difficulties high shielding factors difficult achieve in practice. This work describes a design for system with adjustable factor that overcomes many of these difficulties. the BASE experiment at CERN, authors use...
We summarize our recent 1.5 parts per billion measurement of the antiproton magnetic moment using multi Penning-trap system BASE collaboration. The result was achieved by combining detection individual spin-transitions a single with novel two-particle spectroscopy technique, which dramatically improved data sampling rate. This contributes to improve test fundamental charge, parity, time reversal (CPT) invariance in baryon sector factor 350 compared last measurement, and 3000 best competing...
We describe a newly developed polytetrafluoroethylene/copper capacitor driven by cryogenic piezoelectric slip-stick stage and demonstrate with the chosen layout capacitance tuning of ≈60 pF at ≈10 background capacitance. Connected to highly sensitive superconducting toroidal LC circuit, we resonant frequency between 345 685 kHz, quality factors Q > 100 000. ultra low noise amplifier, range 520 710 kHz is reached, while 86 000 are achieved. This new device can be used as versatile image...
The Standard Model (SM) of particle physics is both incredibly successful and glaringly incomplete. Among the questions left open striking imbalance matter antimatter in observable universe which inspires experiments to compare fundamental properties matter/antimatter conjugates with high precision. Our deal direct investigations protons antiprotons, performing spectroscopy advanced cryogenic Penning-trap systems. For instance, we compared proton/antiproton magnetic moments 1.5 ppb...
We present a fluorescence-detection system for laser-cooled 9Be+ ions based on silicon photomultipliers (SiPMs) operated at 4 K and integrated into our cryogenic 1.9 T multi-Penning-trap system. Our approach enables fluorescence detection in hermetically sealed Penning-trap chamber with limited optical access, where state-of-the-art using telescope room temperature would be extremely difficult. characterize the properties of SiPM cryocooler K, we measure dark count rate below 1 s-1...
Divalent atoms and ions with a singlet $S$ ground state triplet $P$ excited form the basis of many high-precision optical atomic clocks. Along metastable $^{3}\mathrm{P}_{0}$ clock state, these systems also have nearby $^{3}\mathrm{P}_{2}$ state. We investigate properties electric quadrupole $^{1}\mathrm{S}_0$$\leftrightarrow$$^{3}\mathrm{P}_{2}$ transition focus on enhancing already existing In particular, we in $^{27}\mathrm{Al}^{+}$ calculate differential polarizability, hyperfine...
Currently, the only worldwide source of low-energy antiprotons is AD/ELENA facility located at CERN. To date, all precision measurements on single have been conducted this and provide stringent tests fundamental interactions their symmetries. However, magnetic field fluctuations from operation limit upcoming measurements. overcome limitation, we designed transportable antiproton trap system BASE-STEP to relocate laboratories with a calm environment. We anticipate that will facilitate...
We present a fluorescence-detection system for laser-cooled 9Be+ ions based on silicon photomultipliers (SiPM) operated at 4 K and integrated into our cryogenic 1.9 T multi-Penning-trap system. Our approach enables fluorescence detection in hermetically-sealed Penning-trap chamber with limited optical access, where state-of-the-art using telescope room temperature would be extremely difficult. characterize the properties of SiPM cryocooler K, we measure dark count rate below 1/s efficiency...