A5014405344- Nuclear physics research studies
- Quantum Computing Algorithms and Architecture
- Atomic and Molecular Physics
- Neutrino Physics Research
- Astro and Planetary Science
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear Physics and Applications
- Quantum Information and Cryptography
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Quantum Chromodynamics and Particle Interactions
- Quantum and electron transport phenomena
- Advanced Chemical Physics Studies
- Particle physics theoretical and experimental studies
- Physics of Superconductivity and Magnetism
- Parallel Computing and Optimization Techniques
- Dark Matter and Cosmic Phenomena
- Neural Networks and Reservoir Computing
- Advanced Data Storage Technologies
- Quantum-Dot Cellular Automata
- Machine Learning in Materials Science
- Nuclear reactor physics and engineering
- Advanced Frequency and Time Standards
- Explainable Artificial Intelligence (XAI)
- Computational Physics and Python Applications
Oak Ridge National Laboratory
2023-2024
Naval Research Laboratory Information Technology Division
2023
Lawrence Livermore National Laboratory
2021-2022
Technical University of Darmstadt
2016-2021
GSI Helmholtz Centre for Heavy Ion Research
2016-2021
University of Tennessee at Knoxville
2015-2016
The authors develop an effective field theory for low-energy nuclear vibrations and use Bayesian statistics to estimate uncertainties the model energies transition rates. From consistent description of a range Ni, Ru, Pd, Cd, Te isotopes within theoretical uncertainties, they conclude that these nuclei can be described as anharmonic vibrators, with older ``textbook'' interpretations but in contrast some more recent interpretations.
Abstract Collective modes emerge as the relevant degrees of freedom that govern low-energy excitations atomic nuclei. These - rotations, pairing and vibrations are separated in energy from non-collective excitations, making it possible to describe them framework effective field theory. Rotations rotations remnants Nambu-Goldstone emergent breaking rotational symmetry phase symmetries finite deformed superfluid nuclei, respectively. The severely constrains structure Lagrangians thereby...
Quantum state preparation by adiabatic evolution is currently rendered ineffective the long implementation times of underlying quantum circuits, comparable to decoherence time present and near-term devices. These can be significantly reduced realizing these circuits with custom gates. Using classical computing, we model output a realistic two-qubit processor implementing two-spin system means This modeled then compared results simulations solving same problem on IBM (IBMQ) systems. When used...
We study the two-neutrino double electron capture on $^{124}$Xe based an effective theory (ET) and large-scale shell model calculations, two modern nuclear structure approaches that have been tested against Gamow-Teller double-beta decay data. In ET, low-energy constants are fit to $\beta^{-}$ transitions around xenon. For model, we use interaction in a large configuration space reproduces spectroscopy of nuclei this mass region. dominant transition $^{124}$Te ground state, find half-lives...
We present a model-independent approach to electric quadrupole transitions of deformed nuclei. Based on an effective theory for axially symmetric systems, the leading interactions with electromagnetic fields enter as minimal couplings gauge potentials, while subleading corrections employ gauge-invariant nonminimal couplings. This yields transition operators that are consistent Hamiltonian, and power counting provides us theoretical uncertainty estimates. successfully test in homonuclear...
We study neutrinoless double-$\ensuremath{\beta}$ decay in an effective field theory (EFT) for heavy nuclei, which are treated as a spherical core coupled to additional neutrons and/or protons. Since the low-energy constants of EFT cannot be fitted data this unobserved decay, we follow alternative strategy constrain these through correlation with double Gamow-Teller transitions. This was recently found hold shell-model calculations, energy-density functionals, and other nuclear structure...
We study $\ensuremath{\beta}$ decays within an effective theory that treats nuclei as a spherical collective core with even number of neutrons and protons can couple to additional neutron and/or proton. First, we explore Gamow-Teller parent odd-odd into low-lying ground, one-photon, two-phonon states the daughter even-even system. The low-energy constants are adjusted data on ground or strengths. corresponding theoretical uncertainty is estimated based power counting theory. For variety...
Heavy even-even nuclei exhibit low-energy collective excitations that are separated in scale from the microscopic (fermion) degrees of freedom. This separation allows us to approach nuclear vibrations within an effective field theory (EFT). In odd-mass and single-particle properties compete at low energies, this makes their description more challenging. article we describe spherical with ground-state spin $I=\frac{1}{2}$ by means EFT couples a fermion freedom core. The relates observables...
The development of quantum processors capable handling practical fluid flow problems represents a distant yet promising frontier. Recent strides in algorithms, particularly linear solvers, have illuminated the path toward solutions for classical solvers. However, assessing capability these systems algorithms (QLSAs) solving ideal equations on real hardware is crucial their future applications. In this study, we examine canonical QLSA, Harrow-Hassidim-Lloyd (HHL) algorithm, accurately system...
We extend an effective field theory developed to describe rotational bands in even-even nuclei the odd-mass case. This organizes Bohr and Mottelson's treatment of a particle coupled rotor as model-independent expansion powers angular velocity overall system. carry out this up fourth order present results for $^{99}$Tc, ${}^{159}$Dy, ${}^{167, 169}$Er, 169}$Tm, ${}^{183}$W, ${}^{235}$U ${}^{239}$Pu. In each case, accuracy breakdown scale can be understood based on single-particle vibrational...
Empirical energy density functionals (EDFs) are generally successful in describing nuclear properties across the table of nuclides. But their limitations motivate using density-matrix expansion (DME) to embed long-range pion interactions into a Skyrme functional. Recent results on impact were both encouraging and puzzling, necessitating careful re-examination DME implementation. Here we take first steps, focusing two-body scalar terms DME. Exchange energies with one-pion contributions well...
Adiabatic quantum computers can solve difficult optimization problems (e.g., the quadratic unconstrained binary problem), and they seem well suited to train machine learning models. In this paper, we describe an adiabatic approach for training support vector machines. We show that time complexity of our is order magnitude better than classical approach. Next, compare test accuracy against a uses Scikit-learn library in Python across five benchmark datasets (Iris, Wisconsin Breast Cancer...
Collective modes emerge as the relevant degrees of freedom that govern low-energy excitations atomic nuclei. These - rotations, pairing and vibrations are separated in energy from non-collective excitations, making it possible to describe them framework effective field theory. Rotations rotations remnants Nambu-Goldstone emergent breaking rotational symmetry phase symmetries finite deformed superfluid nuclei, respectively. The severely constrains structure Lagrangians thereby clarifies what...
Quantum Natural Language Processing (QNLP) develops natural language processing (NLP) models for deployment on quantum computers. We explore feature and data prototype selection techniques to address challenges posed by encoding high dimensional features. Our study builds circuit classifiers that includes classical pre-processing, embedding model training. The are built 4 or 6 qubits the neural network (QNN) uses established bricklayer design. compare dependence of performance (in terms...
We recently developed an Effective Field Theory (EFT) for rotational bands in odd-mass nuclei. Here we use EFT expressions to perform a Bayesian analysis of data on the energy levels 99 Tc, 155,157 Gd, 159 Dy, 167,169 Er, Tm, 183 W, 235 U and 239 Pu. The error model our includes both experimental truncation uncertainties. It also accounts fact that low-energy constants (LECs) at even odd orders are expected have different sizes. Markov Chain Monte Carlo (MCMC) sampling explore joint...
We recently developed an Effective Field Theory (EFT) for rotational bands in odd-mass nuclei. Here we use EFT expressions to perform a Bayesian analysis of data on the energy levels $^{99}$Tc, ${}^{155,157}$Gd, ${}^{159}$Dy, ${}^{167, 169}$Er, 169}$Tm, ${}^{183}$W, ${}^{235}$U and ${}^{239}$Pu. The error model our includes both experimental truncation uncertainties. It also accounts fact that low-energy constants (LECs) at even odd orders are expected have different sizes. Markov Chain...
This work introduces an extension to the Tensor Network Quantum Virtual Machine (TNQVM) tool, enhancing existing stack of ExaScale (ExaTN), Accelerator (XACC), and TNQVM. It features a new plugin that enables efficient simulation Projected Entangled Pair State (PEPS), 2D tensor network. To improve efficiency for PEPS, we have implemented snake boundary contraction algorithm. By integrating this capability into stack, enhance overall functionality versatility framework. We tested PEPS...