A5004635782- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Atomic and Molecular Physics
- Quantum Information and Cryptography
- Advanced Chemical Physics Studies
- Astrophysics and Cosmic Phenomena
- Spectroscopy and Quantum Chemical Studies
- Radiation Detection and Scintillator Technologies
- Spectroscopy and Laser Applications
- Laser-induced spectroscopy and plasma
- Chaos-based Image/Signal Encryption
- Particle physics theoretical and experimental studies
- Molecular Junctions and Nanostructures
- Optical Coatings and Gratings
- Neutrino Physics Research
- Precipitation Measurement and Analysis
- Cryospheric studies and observations
- Computer Graphics and Visualization Techniques
- Muon and positron interactions and applications
- Radiation Therapy and Dosimetry
- Dust and Plasma Wave Phenomena
University of Michigan–Ann Arbor
2019-2024
Michigan United
2023-2024
Aristotle University of Thessaloniki
2021
Frumkin Institute of Physical Chemistry and Electrochemistry
2016-2017
Nazarbayev University
2014-2017
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around world to discuss exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter gravitational waves. primary objective was lay groundwork an international TVLBAI proto-collaboration. collaboration aims unite researchers different institutions strategize...
We prepare and analyze Rydberg states with orbital quantum numbers <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi>ℓ</a:mi><a:mo>≤</a:mo><a:mn>6</a:mn></a:mrow></a:math> using three-optical-photon electromagnetically induced transparency (EIT) radio frequency (rf) dressing, employ the high-<b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mi>ℓ</b:mi></b:math> in electric-field sensing. Rubidium-85 atoms a room-temperature vapor cell are first promoted into <c:math...
Abstract Sea ice cools Earth by reducing its absorbed solar energy. We combine radiative transfer modeling with satellite‐derived surface albedo, sea ice, and cloud distributions to quantify the top‐of‐atmosphere effect (SIRE). Averaged over 1980–2023, Arctic Antarctic SIREs range from −0.64 −0.86 W m −2 −0.85 −0.98 , respectively, different data sets assumptions of climatological versus annually‐varying clouds. SIRE trends, however, are relatively insensitive these assumptions. has weakened...
Multi-photon electromagnetically-induced transparency (EIT) of atomic vapors involves several intermediate levels. The sub-structure these levels and their collisional interactions can drastically alter experimental EIT signals. Here, we report on hyperfine structure collision effects in three-photon Rydberg the cascade $5S_{1/2} \rightarrow$ $5P_{1/2} \rightarrow 5D_{3/2}$ $\rightarrow 25F_{5/2}$ a room temperature $^{85}$Rb vapor cell. In our measurements spectra, identify two types...
An experimental study on Rydberg electromagnetically induced transparency (EIT) in rubidium (Rb) vapor cells containing inert gases at pressures ≤5 Torr is reported. Using an inert-gas-free Rb cell as a reference, we measure frequency shift and line broadening of the EIT spectra with argon, neon, or nitrogen ranging from few mTorr to 5 Torr. The results qualitatively agree pseudo-potential model that includes s-wave scattering between electron inert-gas atoms effect polarization by atoms....
The decay of Rydberg-atom--ion molecules (RAIMs) due to nonadiabatic couplings between electronic potential-energy surfaces is investigated. We employ the Born-Huang representation and perform numerical simulations using a Crank-Nicolson algorithm. lifetimes rubidium RAIMs for lowest ten vibrational states, $\ensuremath{\nu}$, are computed selected Rydberg principal quantum numbers, $n$. found generally exceed radiative Rydberg-atom lifetimes. observe explain trend as function...
We present possible design concepts for a tractor atom interferometer (TAI) based on three-dimensional confinement and transport of ultracold atoms. The reduces device size wave-packet dispersion, enables arbitrary holding times, facilitates control to create complex trajectories that allow optimization cancel unwanted sensitivity, fast splitting recombination, suppression detrimental nonadiabatic excitation. Thus, the allows further advancement compact, high-sensitivity, quantum sensing...
Cold-atom-based ion sources (CABIS) are a timely example of how laser cooling and trapping can be used in practical applications, such as nanofabrication microscopy. Unfortunately, Coulomb repulsion between ions significantly deteriorate CABIS performance. The authors demonstrate that embedded Rydberg atoms for noninvasive, near-real-time measurement the electric fields CABIS, thereby to control Coulomb-induced degradation via feedback. spectra different states reveal which suitable low-...
We utilize two-photon, high-precision microwave spectroscopy of $ng\ensuremath{\rightarrow}(n+2)g$ transitions to precisely measure the high-angular-momentum $g$-series quantum defect $^{85}\mathrm{Rb}$. Samples cold Rydberg atoms in $ng$ state are prepared via a three-photon optical excitation combined with controlled electric-field mixing and probed 40-$\ensuremath{\mu}\mathrm{s}$-long interaction pulses. The leading systematic uncertainty arises from DC Stark shifts, which is addressed by...
We investigate the possible realization of an ultracold-atom rotation sensor that is based on recently proposed tractor atom interferometry (TAI). An experimental design includes generation a Laguerre–Gaussian-beam-based “pinwheel” optical lattice and multi-loop interferometric cycles discussed. Numerical simulations system demonstrate TAI sensitivity comparable to contemporary matter-wave interferometers. analyze regime sensors in which nonadiabatic effects may hinder system's performance....
In cosmic rays physics often a simple charged particle detector with fast response, best possible pulse time resolution and large linear range is required. For that purpose, we have developed design based on the detection of Cherenkov radiation produced by particles in thick optical glass used as medium photomultiplier tube. this work, results parameters simulation experimental verification are presented.
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around world to discuss exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter gravitational waves. primary objective was lay groundwork an international TVLBAI proto-collaboration. collaboration aims unite researchers different institutions strategize...
Horizon-T" is an innovative detector system located at Tien Shan high-altitude Science Station (TSHASS) approximately 3340 meters above the sea level.It consists of eight detection points separated by distance up to one kilometer that can measure time characteristics Extensive Air Showers (EAS) and record signal shapes with resolution ~10 ns.It was constructed register EAS in energy range 10 16 eV coming from a wide zenith angles (0 o -85 ).The includes both plastic scintillator particle...
Horizon-T, a modern Extensive Air Showers (EAS) detector system, is constructed at Tien Shan high-altitude Science Station of Lebedev Physical Institute the Russian Academy Sciences approximately 3340 meters above sea level in order to study energy range 10^16 eV coming from wide zenith angles (0 - 85 degrees). The includes eight charged particle detection points and Vavilov-Cherenkov radiation detector. Each response calibrated using single MIP (minimally ionizing particle) signal. details...
We propose a tractor atom interferometer (TAI) based on three-dimensional (3D) confinement and transport of split atomic wave-function components in potential wells that follow programmed paths. The paths are to recombine wave functions at well-defined space-time points, guaranteeing closure the interferometer. Uninterrupted 3D interfering eliminates coherence loss due wave-packet dispersion. Using Crank-Nicolson simulation time-dependent Schr\"odinger equation, we compute quantum evolution...
An implementation of a novel glass-based detector with fast response and wide detection range is needed to increase resolution for ultra-high energy cosmic rays detection. Such has been designed built the Horizon-T system at Tien Shan high-altitude Science Station. The main characteristics, such as design, duration pulse calibration single particle are discussed.
This paper presents the physical concept and test results of sample data high-speed hardware true random number generator design based on typically used for High Energy Physics hardware. Main features this are high speed numbers generation (tens Mbt/s), miniature size estimated lower production cost. allows use such a device not only in large companies government offices but end-user cryptography, classrooms, scientific Monte-Carlo simulations, computer games any other place where is...
Hanbury Brown–Twiss interference and stimulated emission, two fundamental processes in atomic physics, have been studied a wide range of applications science technology. We study effects that occur when weak probe is sent through gas two-level atoms are prepared singly excited collective (Dicke or "superatom") state for factorized state. measure the time-integrated second-order correlation function g(2) output field as delay τ between input radiation emitted by find that, Dicke state, twice...
We propose a novel type of Rydberg dimer, consisting Rydberg-state atom bound to distant positive ion. The molecule is formed through long-range electric-multipole interaction between the and pointlike present potential energy curves (PECs) that are asymptotically connected with nP or nD states rubidium cesium. PECs exhibit deep, wells which support many vibrational Rydberg-atom-ion molecules (RAIMs). consider photoassociation RAIMs in both weak strong optical-coupling regimes initial...
We use double-resonant two-photon laser spectroscopy to measure the dynamic scalar polarizability of rubidium $5{D}_{3/2}$ level, ${\ensuremath{\alpha}}_{5{D}_{3/2}}^{S}$, at a wavelength $\ensuremath{\lambda}=1064$ nm. Since $\ensuremath{\lambda}$ is shorter than photoionization (PI) limit Rb this state undergoes significant broadening due PI. The 1064-nm field applied in form deep optical lattice ($\ensuremath{\sim}{10}^{5}$ photon recoils) generated by an in-vacuum field-enhancement...
Avoided crossings of level pairs with opposite slopes can form potential energy curves for the external degree freedom quantum particles. We investigate nonadiabatic decay metastable states on such avoided (MSACs) using diabatic and adiabatic representations. The system is described by a single scaled adiabaticity parameter, $V$. time-independent two-component Schr\"odinger equation solved in both representations, lifetimes MSACs are determined from wave-function flux calculation...
We report a measurement of the dynamic (ac) scalar polarizability 5D3/2 state in 85Rb atoms at laser wavelength 1064 nm. Contrary to recent Phys. Rev. A 104, 063304 (2021), experiments are performed low-intensity regime which ac shift is less than state’s hyperfine structure, as utilized numerous with cold, trapped atoms. The extracted α5D3/2=−499±59 a.u., within uncertainty aforementioned previous result. calibration nm light intensity, by analyzing shifts D1 line, main source uncertainty....
Accurate data on electric-dipole transition matrix elements (EDTMs) for bound-bound Rydberg-atom transitions have become increasingly important in science and technology. Here we compute radial EDTMs of rubidium length, velocity, acceleration forms electric-dipole-allowed between states with principal angular-momentum quantum numbers $n$ $\ensuremath{\ell}$ ranging from 15 to 100. Wave functions are computed based upon model potentials [Phys. Rev. A 49, 982 (1994)]. Length-gauge strong...