A5009839387- Cold Atom Physics and Bose-Einstein Condensates
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Particle physics theoretical and experimental studies
- Advanced Frequency and Time Standards
- Atomic and Molecular Physics
- Superconducting Materials and Applications
- Quantum Chromodynamics and Particle Interactions
- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Mass Spectrometry Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- CCD and CMOS Imaging Sensors
- Advanced Fiber Laser Technologies
- Spectroscopy and Laser Applications
- Advanced Chemical Physics Studies
- High-Energy Particle Collisions Research
- Photocathodes and Microchannel Plates
- Dark Matter and Cosmic Phenomena
- Plasma Diagnostics and Applications
- Urban Stormwater Management Solutions
Old Dominion University
2022-2025
Dominion University College
2025
University of Nevada, Las Vegas
2024
ETH Zurich
2020-2023
University of Colorado Boulder
2011-2021
Joint Institute for Laboratory Astrophysics
2017-2021
RheinMain University of Applied Sciences
2015
National Institute of Standards and Technology
2011-2014
California Institute of Technology
2014
Brookhaven National Laboratory
2000-2004
We describe the first precision measurement of electron's electric dipole moment (de) using trapped molecular ions, demonstrating application spin interrogation times over 700 ms to achieve high sensitivity and stringent rejection systematic errors. Through electron resonance spectroscopy on Hf180F+19 in its metastable Δ31 electronic state, we obtain de=(0.9±7.7stat±1.7syst)×10−29 e cm, resulting an upper bound |de|<1.3×10−28 cm (90% confidence). Our result provides independent confirmation...
We investigate the synchronization of oscillators based on anharmonic nanoelectromechanical resonators. Our experimental implementation allows unprecedented observation and control parameters governing dynamics synchronization. find close quantitative agreement between data theory describing reactively coupled Duffing resonators with fully saturated feedback gain. In synchronized state we demonstrate a significant reduction in phase noise oscillators, which is key for sensor clock...
Polar molecules are desirable systems for quantum simulations and cold chemistry. Molecular ions easily trapped, but a bias electric field applied to polarize them tends accelerate out of the trap. We present general solution this issue by rotating slowly enough molecular polarization axis follow rapidly stay trapped. demonstrate Ramsey spectroscopy between Stark-Zeeman sublevels in 180Hf19F+ with coherence time 100 ms. Frequency shifts arising from well-controlled topological (Berry) phases...
We use our recent electric dipole moment (EDM) measurement data to constrain the possibility that ${\mathrm{HfF}}^{+}$ EDM oscillates in time due interactions with candidate dark matter axionlike particles (ALPs). employ a Bayesian analysis method which accounts for both look-elsewhere effect and uncertainties associated stochastic density fluctuations ALP field. find no evidence of an oscillating over range spanning from 27 nHz 400 mHz, we this result ALP-gluon coupling mass...
We propose the use of 2-dimensional Penning trap arrays as a scalable platform for quantum simulation and computing with trapped atomic ions. This approach involves placing micro-structured electrodes defining static electric quadrupole sites in magnetic field, single ions at each site coupled to neighbors via Coulomb interaction. solve normal modes ion motion such arrays, derive generalized multi-ion invariance theorem stable even presence imperfections. these techniques investigate...
The CP-violating interaction of the nuclear magnetic quadrupole moment (MQM) $^{175}$Lu nucleus with electrons in molecular cation LuOH$^+$ is studied. resulting effect expressed terms CP-odd parameters, such as quantum chromodynamics angle $\bar{\theta}$, quark electric dipole (EDM) and chromo-EDM. For this we have performed a calculation MQM well constant that characterises electrons. Additionally, predict hyperfine structure constants for ground electronic state LuOH$^+$. We conclude...
The characteristics of fecal sludge delivered to treatment plants are highly variable. Adapting process operations accordingly is challenging due a lack analytical capacity for characterization and monitoring at many plants. Cost-efficient simple field measurements such as photographs probe readings could be proxies control parameters that normally require laboratory analysis. To investigate this, we evaluated questionnaire data, expert assessments, collected from 421 onsite containments....
This paper presents an experimental platform designed to facilitate quantum logic control of polar molecular ions in a segmented ring ion trap, paving the way for precision measurements. approach focuses on achieving near-unity state preparation and detection, as well long spin-precession coherence. A distinctive aspect lies separating detection conducted static frame from parity-selective spin precession rotating frame. Moreover, method is support spatially temporally coincident...
We explore the feasibility of hybrid quantum computing using both discrete (qubit) and continuous (qumode) variables on trapped-ion platforms. Trapped-ion systems have demonstrated record one- two-qubit gate fidelities long qubit coherence times while qumodes, which can be represented by collective vibrational modes ion chain, remained relatively unexplored for their use in computing. Using numerical simulations, we show that high-fidelity gates measurement operations achieved existing As an...
Autoionization of Rydberg states HfF, prepared using the optical-optical double resonance (OODR) technique, holds promise to create HfF+ in a particular Zeeman level rovibronic state for an electron electric dipole moment (eEDM) search. We characterize vibronic band HfF at 54 cm-1 above lowest ionization threshold and directly probe ions formed from this by performing laser-induced fluorescence (LIF) on ions. The molecules show propensity decay into only few ion rotational given parity are...
The LuOH$^+$ cation is a promising system to search for manifestations of time reversal and spatial parity violation effects. Such effects in induced by the electron electric dipole moment $e$EDM scalar-pseudoscalar interaction nucleus with electrons, characterized $k_s$ constant, are studied. enhancement factors, polarization external field, hyperfine interaction, rovibrational structure calculated. study required experiment preparation extraction eEDM ks values from experimental data.
We report on the realization of a hemispherical optical cavity with finesse F = 13 000 and sustaining inter-cavity powers 10 kW, which we operate in closed-cycle cryostat vacuum system close to 4 K. This was designed built an integrated radio-frequency Paul trap order combine trapping. The provides power build-up factor 2300. describe number aspects system's design operation, including low-vibration mounting locking thermal effects at high powers. Thermal self-locking intracavity regime...
Spin polarized photocathodes are key to the future operation of electron accelerators such as ones at Thomas Jefferson National Accelerator Facility and Brookhaven Laboratory. Currently, these come in short supply due limited production by molecular beam epitaxy. By developing a process implement similar structures using metal organic chemical vapor deposition, availability devices can be increased. In this paper, we detail implementation recent photocathode advancements via deposition show...
Techniques and results of RHIC BPM measurements are presented. These include wire scanner uncalibrated calibrated position roll accuracy, preliminary the coupling between adjacent striplines to permit in situ offset calibration signal cables electronics, frequency dependence location electrical center, antenna installed center relative cryostat fudicials. We also present simulations cryogenic cable heating, testing feedthrus.
Design calculations, design details, and fabrication techniques for the RHIC BPM Assemblies are discussed. The 69 mm aperture single plane detectors 23 cm long short-circuited 50 ohm strip transmission lines subtending 80 degrees. They mounted on sextupole end of corrector-quadrupole-sextupole package operate at liquid helium temperature. was selected to be same as that beampipe in CQS package, length is a compromise between mechanical stability electrical sensitivity low-intensity proton...
Shaping of laser light intensities by using Diffractive Optical Elements allows the adaption incident to its application. Fused silica is used where for example UV-light or high temperatures are mandatory. For diffraction efficiency quality etched surface areas important. The investigation different process parameters Ion Beam and Reactive Etching reveals that only provides surfaces with optical quality. Measurements influence on efficiencies prove generated not suitable. Due selectivity...
We explore the application of quantum optimal control (QOC) techniques to state preparation lattice field theories on computers. As a first example, we focus Schwinger model, electrodynamics in 1+1 dimensions. demonstrate that QOC can significantly speed up ground compared gate-based methods, even for models with long-range interactions. Using classical simulations, dependence inter-qubit coupling strength and device connectivity, study optimization presence noise. While our simulations...