A5059345162- Advanced Frequency and Time Standards
- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- Geophysics and Sensor Technology
- Advanced Electrical Measurement Techniques
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Neural Networks and Reservoir Computing
- Quantum and electron transport phenomena
- Advanced Fiber Laser Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Sensor Technology and Measurement Systems
- Scientific Measurement and Uncertainty Evaluation
- Quantum Mechanics and Applications
- Semiconductor Lasers and Optical Devices
- Magnetic confinement fusion research
- Laser Design and Applications
- Parallel Computing and Optimization Techniques
- Housing, Finance, and Neoliberalism
- Advancements in PLL and VCO Technologies
- Quantum-Dot Cellular Automata
- Advancements in Semiconductor Devices and Circuit Design
- Network Time Synchronization Technologies
- Target Tracking and Data Fusion in Sensor Networks
- Neural Networks and Applications
Pacific Northwest National Laboratory
2022-2025
The Graduate Center, CUNY
2022
City University of New York
2022
Politecnico di Milano
2022
Queen Mary University of London
2022
Istanbul Medeniyet University
2022
Microsemi (Canada)
2010
Ball (United States)
1986-2003
Northgate Hospital
1998
United States Department of Veterans Affairs
1989
The rapid development of quantum computing (QC) in the NISQ era urgently demands a low-level benchmark suite and insightful evaluation metrics for characterizing properties prototype devices, efficiency QC programming compilers, schedulers assemblers, capability system simulators classical computer. In this work, we fill gap by proposing low-level, easy-to-use called QASMBench based on OpenQASM assembly representation. It consolidates commonly used routines kernels from variety domains...
The rapid development of quantum computing (QC) in the NISQ era urgently demands a low-level benchmark suite and insightful evaluation metrics for characterizing properties prototype devices, efficiency QC programming compilers, schedulers assemblers, capability system simulators classical computer. In this work, we fill gap by proposing low-level, easy-to-use called QASMBench based on OpenQASM assembly representation. It consolidates commonly used routines kernels from variety domains...
Variational quantum algorithm (VQA), which is comprised of a classical optimizer and parameterized circuit, emerges as one the most promising approaches for harvesting power computers in noisy intermediate scale (NISQ) era. However, deployment VQAs on contemporary NISQ devices often faces considerable system time-dependant noise prohibitively slow training speeds. On other hand, expensive supporting resources infrastructure make extremely keen high utilization.
X-band microwave oscillators stabilized with superconducting niobium cavities loaded Q's of about 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sup> achieved short-term frequency stabilities as low σ <inf xmlns:xlink="http://www.w3.org/1999/xlink">y</inf> =6 × xmlns:xlink="http://www.w3.org/1999/xlink">-16</sup> , and typical long-term fractional drifts ± 2 xmlns:xlink="http://www.w3.org/1999/xlink">-13</sup> per day.
We have completed a phase 1 SBIR project to develop technology for direct phase-noise measurements. This new approach measurements uses fast analog-to-digital converters digitize the input RF signal and performs all down-conversion detection functions by digital processing. It has several significant advantages over analog measurement techniques: there is no external phase-lock loop; oscillators can be compared at different frequencies; amplitude noise may measured simultaneously; spectrum...
Recent advancements have highlighted the limitations of current quantum systems, particularly restricted number qubits available on near-term devices. This constraint greatly inhibits range applications that can leverage computers. Moreover, as increase, computational complexity grows exponentially, posing additional challenges. Consequently, there is an urgent need to use efficiently and mitigate both present future complexities. To address this, existing attempt integrate classical systems...
This is a draft revision of IEEE Std 1139-1988 Standard Definitions Physical Quantities for Fundamental Frequency and Time Metrology. standard covers the fundamental metrology describing random instabilities importance to frequency time metrology. covered include frequency, amplitude, phase instabilities; spectral densities fluctuations; variances prediction; confidence limits when estimating variance from finite data set. The unit measure characterizing in domain L(f), defined as one half...
Abstract : A very high stability microwave oscillator system was developed which has a Q superconducting cavity as its frequency determining element. In stabilized (SCSO), the rf power is generated by Gunn-Effect whose electronically tuned varactor diode. An intermediate discriminator used to produce feedback voltage maintains at center of resonance. improved stabilization now reported higher short term stability.
In this paper, we explore using the Harrow-Hassidim-Lloyd (HHL) algorithm to address scientific and engineering problems through quantum computing utilizing NWQSim simulation package on high-performance computing. Focusing domains such as power-grid management heat transfer problems, demonstrate correlations of precision phase estimation, along with various properties coefficient matrices, final solution resource cost in iterative non-iterative numerical methods Newton-Raphson method finite...
Many proposals to scale quantum technology rely on modular or distributed designs wherein individual processors, called nodes, are linked together form one large multinode computer (MNQC). One scalable method construct an MNQC is using superconducting systems with optical interconnects. However, internode gates in these may be two three orders of magnitude noisier and slower than local operations. Surmounting the limitations will require improvements entanglement generation, use...
An optimum algorithm has been developed for estimating the time, frequency, and frequency aging of clocks oscillators. The is sufficiently general to be used with all types quartz oscillators atomic clocks, yet approach appropriate use an embedded controller in automated systems intended field applications. based on Kalman filtering techniques can process either time or calibration data from various sources different qualities. Data are accepted whenever available not required at fixed...
A rectangular metal–dielectric far-infrared waveguide laser has been operated on the individual Stark components of CH3F by application an electric field across medium. The results agree well with theoretical predictions.
The Allan variance has historically been estimated using heterodyne measurement systems, which have low noise and preserve the carrier phase information needed for long-term stability. single-sideband traditionally detectors that suppress to achieve even lower noise. recent development of direct-digital technique makes it possible estimate both statistics accurately simultaneously from same time series phase. Our comparison 3 techniques revealed several challenges accurate estimation...
Quantum computing technology has grown rapidly in recent years, with new technologies being explored, error rates reduced, and quantum processors' qubit capacity growing. However, near-term algorithms are still unable to be induced without compounding consequential levels of noise, leading non-trivial erroneous results. Error Correction (in-situ mitigation) Mitigation (post-induction promising fields research within the algorithm scene, aiming alleviate errors. IBM recently published an...
Superconducting Nb cavities of high Q factor have been used to stabilise Gunn-effect oscillators. These stabilised oscillators given an r.m.s. frequency deviation σ(N = 2, r 1.004, τ 10) (1.2±0.1)×10−13 for averaging time 10s.
Electronic frequency tuning of an optically pumped far infrared waveguide laser has been achieved by using the Stark effect. Frequency modulation with a 50-kHz and index greater than 1 observed as well maximum 300 kHz.
Abstract : A fully automated measurement system has been developed that combines many properties previously realized with separate techniques. This is an extension of the dual mixer time difference technique, and maintains its important features: zero dead time, absolute phase different measurement, very high precision, ability to measure oscillators equal frequency make measurements at operator's choice. For one set design parameters, theoretical resolution 0.2 ps, noise 2 ps rms may be...
The success of a quantum algorithm hinges on the ability to orchestrate successful application induction. Detrimental overheads in mapping general circuits physically implementable routines can be deciding factor between and erroneous circuit In QASMTrans, we focus problem rapid transpilation. Transpilation plays crucial role converting high-level, machine-agnostic into machine-specific constrained by physical topology supported gate sets. efficiency transpilation continues substantial...
Bulimia nervosa is very rare in children below the age of 14 years, and no reliable reports prepubertal bulimia have been published. We describe two cases early-onset who presented before with premenarchal onset one patient. Both girls demonstrated high levels risk factors known to play a part etiology nervosa. Implications these regarding occurrence younger adolescents are discussed.
An optimum algorithm has been developed for estimating the time, frequency, and frequency aging of clocks oscillators while simultaneously noise spectrum. The is sufficiently general to be used with all types quartz atomic yet approach appropriate use an embedded controller in automated systems intended field applications. technique adaptive-it calculates updates estimates required clock parameters as observations occur. Data are accepted whenever available not at fixed multiples a sampling...