A5080399868- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced NMR Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Advanced MRI Techniques and Applications
- Advanced Frequency and Time Standards
- Electron Spin Resonance Studies
- Mechanical and Optical Resonators
- NMR spectroscopy and applications
- Quantum Information and Cryptography
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Magneto-Optical Properties and Applications
- Quantum, superfluid, helium dynamics
- Photonic Crystal and Fiber Optics
- Magnetic Field Sensors Techniques
- Solid-state spectroscopy and crystallography
- Optical Network Technologies
- Cosmology and Gravitation Theories
- Magnetic and transport properties of perovskites and related materials
- Laser-Plasma Interactions and Diagnostics
- Radiation Therapy and Dosimetry
- Particle Detector Development and Performance
- Quantum Mechanics and Applications
Jagiellonian University
2016-2025
Harvard University
2025
Institute of Physics
2015-2024
Goethe University Frankfurt
2023
University of California, Berkeley
2007-2020
Helmholtz Institute Mainz
2016-2020
Johannes Gutenberg University Mainz
2016-2020
California State University, East Bay
2016
Campbell Collaboration
2016
Technical University of Munich
2016
Stable topological defects of light (pseudo)scalar fields can contribute to the Universe's dark energy and matter. Currently, combination gravitational cosmological constraints provides best limits on such a possibility. We take an example domain walls generated by axionlike field with coupling spins standard-model particles show that, if galactic environment contains network walls, terrestrial experiments aimed at detection wall-crossing events are realistic. In particular, geographically...
We review instrumentation for nuclear magnetic resonance (NMR) in zero and ultra-low field (ZULF, below 0.1 $\mu$T) where detection is based on a low-cost, non-cryogenic, spin-exchange relaxation free (SERF) $^{87}$Rb atomic magnetometer. The typical sensitivity 20-30 fT/Hz$^{1/2}$ signal frequencies 1 kHz NMR linewidths range from Hz all the way down to tens of mHz. These features enable precision measurements chemically informative spin-spin couplings as well spin precession fields.
A novel experimental scheme enabling the investigation of transient exotic spin couplings is discussed. The based on synchronous measurements optical‐magnetometer signals from several devices operating in magnetically shielded environments distant locations (≳ 100 km). Although signatures such may be present signal a single magnetometer, it would challenging to distinguish them noise. By analyzing correlation between multiple, geographically separated magnetometers, not only possible...
Abstract Ultralight bosons such as axion-like particles are viable candidates for dark matter. They can form stable, macroscopic field configurations in the of topological defects that could concentrate matter density into many distinct, compact spatial regions small compared with Galaxy but much larger than Earth. Here we report results search transient signals from domain walls by using global network optical magnetometers exotic (GNOME) physics searches. We data, consisting correlated...
Using laser optical pumping, widths and frequency shifts are determined for microwave transitions between ground-state hyperfine components of $^{85}$Rb $^{87}$Rb atoms contained in vapor cells with alkane anti-relaxation coatings. The results compared data on Zeeman relaxation obtained nonlinear magneto-optical rotation (NMOR) experiments, a comparison important quantitative understanding spin-relaxation mechanisms coated cells. By comparing manufactured over forty-year period we...
Recent work investigating resonant nonlinear magneto-optical rotation (NMOR) related to long-lived ($τ\ts{rel} \sim 1 {\rm s}$) ground-state atomic coherences has demonstrated potential magnetometric sensitivities exceeding $10^{-11} G/\sqrt{Hz}}$ for small ($\lesssim μG}$) magnetic fields. In the present work, NMOR using frequency-modulated light (FM NMOR) is studied in regime where longitudinal field geophysical range ($\sim 500 mG}$), of particular interest many applications. this a...
A radio-frequency tunable atomic magnetometer with a sensitivity of about 1 fT/Hz1/2 in range 10–500 kHz is demonstrated. The operated the orientation configuration which atoms are pumped to stretched state by scheme based on indirect optical pumping using only one unmodulated, low-power laser. operates cesium atoms, have sufficient vapor pressure near room temperature enable high magnetometric sensitivities. technique enables compact and robust module be constructed that could become an...
Nuclear magnetic resonance (NMR) spectroscopy is a well-established analytical technique used to study chemicals and their transformations. However, high-field NMR necessitates advanced infrastructure, even cryogen-free benchtop spectrometers cannot be readily assembled from commercially available components. We demonstrate construction of portable zero-field spectrometer employing magnetometer investigate its applications in chemistry. In particular, J-spectra small representative...
The technique of nonlinear magneto-optical rotation with amplitude modulated light is developed. an alternative to its counterpart frequency and can be applied sensitive measurements magnetic fields ranging from microgauss the Earth-field level. signals exhibit nontrivial features such as narrowed non-Lorentzian line shapes multicomponent resonances.
We report an observation of long-lived spin-singlet states in a 13C-1H spin pair zero magnetic field. In 13C-labeled formic acid, we observe lifetimes as long 37 s, about factor 3 longer than the T1 lifetime dipole polarization triplet state. contrast to common high-field experiments, observed coherence is singlet-triplet with T2 manifold. Moreover, demonstrate that heteronuclear singlet formed between 1H and 13C nucleus can exhibit respective even presence additional spins couple interest....
Agreement between theoretical calculations of atomic structure and spectroscopic measurements is used to constrain possible contribution exotic spin-dependent interactions electrons the energy differences states in helium-4. In particular, constraints on dipole-dipole associated with exchange pseudoscalar bosons (such as axions or axion-like particles) masses ${10}^{\ensuremath{-}2}\ensuremath{\lesssim}m\ensuremath{\lesssim}{10}^{4}\mathrm{eV}$ are improved by a factor...
Light (pseudo-)scalar fields are promising candidates to be the dark matter in Universe. Under certain initial conditions early Universe and/or with types of self-interactions, they can form compact dark-matter objects such as axion stars or $Q$-balls. Direct encounters searched for by using a global network atomic magnetometers. It is shown that range masses and radii not ruled out existing observations, terrestrial encounter rate $Q$-balls sufficiently high (at least once per year)...
Abstract The Gamma Factory initiative proposes to develop novel research tools at CERN by producing, accelerating, and storing highly relativistic, partially stripped ion beams in the SPS LHC storage rings. By exciting electronic degrees of freedom stored ions with lasers, high‐energy narrow‐band photon will be produced properly collimating secondary radiation that is peaked direction ions' propagation. Their intensities, up 10 17 photons per second, several orders magnitude higher than...
Self-compensated comagnetometers, employing overlapping samples of spin-polarized alkali and noble gases (for example K-${}^{3}\mathrm{He}$) are promising sensors for exotic beyond-the-standard-model fields high-precision metrology such as rotation sensing. When the comagnetometer operates in so-called self-compensated regime, effective field, originating from contact interactions between valence electrons noble-gas nuclei, is compensated with an applied magnetic field. begins operation a...
We propose and demonstrate a general method to calibrate the frequency-dependent response of self-compensating noble-gas-alkali-metal comagnetometers arbitrary spin perturbations. This includes magnetic nonmagnetic perturbations like rotations exotic interactions. The is based on fit field an analytical model. comagnetometer can be inferred using parameters. effectiveness this by comparing rotation experimental measurement response. Our results show that experiments relying zero-frequency...
We report on an all-optical magnetometric technique based nonlinear magneto-optical rotation with amplitude-modulated light. The method enables sensitive magnetic field measurements in a broad dynamic range. demonstrate the sensitivity of 4.3×10−9G∕Hz at 10mG and tracking range 40mG. fundamental limits factors determining current performance magnetometer are discussed.
Atomic-vapor density change due to light induced atomic desorption (LIAD) is studied in paraffin-coated rubidium, cesium, sodium, and potassium cells. In the present experiment, low-intensity probe used obtain an absorption spectrum measure vapor density, while from argon-ion laser, array of emitting diodes, or discharge lamp for desorption. Potassium found exhibit significantly weaker LIAD paraffin compared Rb Cs, we were unable observe with sodium. A simple model applied describe observed...
Vapor cells with antirelaxation coating are widely used in modern atomic physics experiments due to the coating's ability maintain atoms' spin polarization during wall collisions. We characterize performance of vapor different materials by measuring longitudinal relaxation and density at temperatures up 95 °C. infer that spin-projection-noise-limited sensitivity for magnetometers such improves temperature, which demonstrates potential coated applications future high-sensitivity magnetometers.
Searches for pseudo-magnetic spin couplings require implementation of techniques capable sensitive detection such interactions. While Spin-Exchange Relaxation Free (SERF) magnetometry is one the most powerful approaches enabling searches, it suffers from a strong magnetic coupling, deteriorating coupling sensitivity. To address this problem, here, we compare, via numerical simulations, performance SERF magnetometer and noble-gas-alkali-metal co-magnetometer, operating in so-called...
Ultralight bosonic dark matter (UBDM) can be described by a classical wave-like field oscillating near the Compton frequency of bosons. If measurement scheme for direct detection UBDM interactions is sensitive to signature quadratic in field, then there near-zero-frequency (dc) component signal. Thus, detector with given finite bandwidth used search bosons frequencies many orders magnitude larger than its bandwidth. This opens possibility analogous Hanbury Brown and Twiss intensity...
In this work, a sensitivity of the rate relaxation ground-state atomic coherences to magnetic-field inhomogeneities is studied. Such give rise many interesting phenomena in light-atom interactions, and their lifetimes are limiting factor for achieving better sensitivity, resolution, or contrast applications. For atoms contained vapor cell, some coherence-relaxation mechanisms related inhomogeneities. We present simple model describing due such buffer-gas-free antirelaxation-coated cell. A...
We describe a room-temperature alkali-metal atomic magnetometer for detection of small, high-frequency magnetic fields. The operates by detecting optical rotation due to the precession an aligned ground state in presence small oscillating field. resonance frequency can be adjusted any desired value tuning bias Based on experimentally measured signal-to-noise ratio, we demonstrate sensitivity $100\phantom{\rule{0.3em}{0ex}}\mathrm{pG}∕\sqrt{\mathrm{Hz}}$ (rms)...