A5100365770- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Dark Matter and Cosmic Phenomena
- Atomic and Molecular Physics
- Advanced Frequency and Time Standards
- Advanced MRI Techniques and Applications
- Laser-Matter Interactions and Applications
- Advanced X-ray Imaging Techniques
- Vacuum and Plasma Arcs
- Advanced Chemical Physics Studies
- Particle Accelerators and Free-Electron Lasers
- Quantum Information and Cryptography
- Advanced Electron Microscopy Techniques and Applications
- Strong Light-Matter Interactions
- Mechanical and Optical Resonators
- Radiation Detection and Scintillator Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Radioactive Decay and Measurement Techniques
- Chaos-based Image/Signal Encryption
- Mass Spectrometry Techniques and Applications
- Chemical Thermodynamics and Molecular Structure
- X-ray Spectroscopy and Fluorescence Analysis
- Chaos control and synchronization
- Digital Holography and Microscopy
Physikalisch-Technische Bundesanstalt
2023-2024
Dalian University of Technology
2024
Nanjing University of Aeronautics and Astronautics
2024
Chongqing University of Posts and Telecommunications
2024
Paul Scherrer Institute
2024
Wenzhou University
2023
Wenzhou Polytechnic
2023
Polish Botanical Society
2023
Heinrich Heine University Düsseldorf
2022
GSI Helmholtz Centre for Heavy Ion Research
2020-2021
The 8.4 eV nuclear isomer state in Th-229 is resonantly excited Th-doped <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msub><a:mrow><a:mi>CaF</a:mi></a:mrow><a:mrow><a:mn>2</a:mn></a:mrow></a:msub></a:mrow></a:math> crystals using a tabletop tunable laser system. A resonance fluorescence signal observed two with different dopant concentrations, while it absent control experiment Th-232. for the <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...
A possible implication of an ultralight dark matter field interacting with the standard model degrees freedom is oscillations fundamental constants. Here, we establish direct experimental bounds on coupling oscillating to up, down, and strange quarks gluons, for oscillation frequencies between 10 10^{8} Hz. We employ spectroscopic experiments that take advantage dependence molecular transition nuclear masses. Our results apply previously unexplored frequency bands improve existing at >5 MHz....
Abstract Nuclear magnetic resonance gyroscopes have the potential to outperform other kinds of with merits high precision, small volume, low consumption. Here we present a closed-loop NMRG system based on spin-exchange optical pumping Rb-Xe. We established theoretical model for and obtained transfer function. The step response, frequency response are calculated through also studied influence parameters performance experimentally, involving sensitivity. experimental results in good agreement...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe active site of hemerythrin as determined by x-ray absorption fine structureKe Zhang, Edward A. Stern, F. Ellis, J. Sanders-Loehr, and K. ShiemkeCite this: Biochemistry 1988, 27, 19, 7470–7479Publication Date (Print):September 1, 1988Publication History Published online1 May 2002Published inissue 1 September 1988https://pubs.acs.org/doi/10.1021/bi00419a045https://doi.org/10.1021/bi00419a045research-articleACS PublicationsRequest reuse...
Abstract Light scalar dark matter (DM) with couplings to is expected within several scenarios induce variations in the fundamental constants of nature. Such can be searched for, among other ways, via atomic spectroscopy. Sensitive observables arise primarily due possible changes fine-structure constant or electron mass. Most searches date have focused on slow (i.e. modulation frequencies <1 Hz). In a recent experiment (2019 Phys. Rev. Lett. 123 141102) called weekend relaxion-search...
In this paper, we demonstrate a three-axis atomic magnetometer based on parametric oscillations, which can measure the three magnetic field components simultaneously and independently. A circularly polarized pump beam is applied to create spin polarization, another linearly probe used detect dynamics of under field. With closed-loop system keep in resonance with atoms, are measured by their feedback signals. We achieve sensitivity 6 pT ()−1, 25 60 ()−1 along axes frequency range from 100 Hz...
Arbitrary manipulation of the temporal and spectral properties X-ray pulses at free-electron lasers (FELs) would revolutionize many experimental applications. At Linac Coherent Light Source Stanford National Accelerator Laboratory, momentum phase-space FEL driving electron bunch can be tuned to emit a pair with independently variable photon energy femtosecond delay. However, while accelerator parameters easily adjusted tune phase-space, final impact these actuators on pulse cannot predicted...
We study the collective effects of an ensemble organic molecules confined in optical cavity based on Holstein-Tavis-Cummings model. By using quantum Langevin approach and adiabatically eliminating degree freedom vibrational motion, we analytically obtain expression transmission spectrum to analyze features polaritonic states. As application, show that dependence for frequency shift lower state number can be used detection ultra-cold molecules. also numerically fluorescence spectrum. The...
Two lowest-energy odd-parity atomic levels of actinium, $7{s}^{2}7p{^{2}P}_{1/2}^{o}$, $7{s}^{2}7p{^{2}P}_{3/2}^{o}$, were observed via two-step resonant laser-ionization spectroscopy and their respective energies measured to be 7477.36(4) $12\text{ }276.59(2)\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}$. The lifetimes these states determined as 668(11) 255(7) ns, respectively. In addition, we the effect hyperfine structure on line for transition ${^{2}P}_{3/2}^{o}$. These properties...
Atomic magnetometers are becoming the most sensitive sensors for magnetic field detections and have found applications in various fields. In nuclear resonance gyroscope (NMRG), researchers usually use an embedded atomic magnetometer to sense transverse fields generated by precessing spins. The additional spin-exchange spin-destruction collisions between alkali-metal inert gas atoms reduce coherence time $\tau$ of atom addition, order achieve NMRG high sensitivity, a relatively small bias...
We have performed a precision atomic interferometry experiment on testing the universality of free fall (UFF) considering atoms' spin degree freedom. Our employs Bragg atom interferometer with $^{87}$Rb atoms either in hyperfine state $\left| {F = 1,{m_F} 0} \right\rangle $ or 2,{m_F} $, and wave packets these two states are diffracted one pair beams alternatively, which can help suppress common-mode systematic errors. obtained an E$\rm{\ddot{o}}$tv$\rm{\ddot{o}}$s ratio $\eta \left( { 0.9...
Using the saturation method, we measured absolute photoionization cross-sections of several excited states titanium, vanadium, chromium, iron, and cobalt. These results are reported for first time in this paper. The values range from 0.4 ± 0.1 Mb to 6.9 2.0 Mb. show that cross-section depends on atomic state not just electronic configuration.
We explore how a displaced chaotic light (DCL) behaves in an amplitude dissipation channel, and what is its time evolution formula of photon number distribution. With the use method integration within ordered product operator (IWOP) new binomial theorem involving two-variable Hermite polynomials we obtain law DCL channel.
This paper presents an experimental study on the spot splitting behavior of aluminum, titanium, and their alloy cathodes during electric arc discharge. Utilizing high-speed digital cameras, we dynamically captured motion cathode spots analyzed under different pressures argon, nitrogen, oxygen. The also examined effects pulsed current parameters splitting. We observed a ringlike expansion splitting, with aluminum showing better performance than titanium in promoting stabilizing subsequent...
Chaos-based cryptosystems are regarded as highly secure techniques for image encryption. However, despite the considerable enhancement of encryption robustness provided by chaotic systems, security vulnerabilities may still arise, potentially leading to drastic damage in contexts involving sensitive data such medical or military images. Identifying these and developing corresponding countermeasures essential prevent breaches achieve higher protection. From this perspective, research...
Accurate rotation sensors are highly demanded in both industrial applications and academic research. We experimentally demonstrate an angle measurement method based on alkali-metal vapor cell. In our experiment, the signal is converted to polarization of laser beam passing through a quarter-wave plate coaxially mounted detected object. The then measured by monitoring transmission Using this method, we sensitivity 2×10−5°/Hz without magnetic shield. results shown paper provide prototype with...