Browsing Physics by Title
Now showing items 208-227 of 291
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Quantum complexity of symmetry-protected topological phases of matter
Classical computers have been instrumental to our understanding of quantum phases of matter. However, their ability to simulate quantum many-body systems is fundamentally limited – there are quantum systems that are ... -
Quantum Dynamics in Rugged Energy Landscapes, and Additional Topics in Disordered Systems
This thesis concerns the interplay of quantum mechanics with strong disorder, and the novel dynamical phases that are unique to disordered quantum systems. The results that we present apply to systems ranging from spin ... -
Quantum light-matter interaction of two-dimensional optical transitions coupled to dielectric microresonators
Photonic integrated circuits have the potential to be a disruptive technology comparable to the success of electronic integrated circuits. The absence of a compact, low-power all-optical nonlinearity limits the capability ... -
Quantum magnetic imaging for DNA biophysical measurements
An outstanding challenge in biophysics is sensing the relative bio-mechanical orienta-tion of single-molecule biological systems. Prior approaches used to study single-molecule biophysics rely on attaching fluorescent or ... -
Quantum Monte Carlo Studies of the BCS-BEC crossover
This dissertation focuses on the physics of dilute Fermi gases in the so-called BCS-BEC crossover, with short-range attractive interactions and large scattering lengths. It introduces a new statistical ensemble, the particle ... -
Quantum Simulation Algorithms with Applications to Quantum Error Correction and Topological Data Analysis
This thesis presents three results of relevance to the simulation of quantum dynamics on quantum computers. The first is the development of hybridized methods of quantum simulation with Alessandro Roggero and Nathan Wiebe. ... -
Quantum Simulation of Quantum Field Theories
The theory of quantum chromodynamics (QCD) describes the nuclear forces that bind quarks into nucleons and nucleons into nuclei. The dynamics in the non-perturbative regime of QCD are of relevance for understanding inelastic ... -
Radiative Models of Sagittarius A* and M87 from Relativistic MHD Simulations
(2011-07)The discovery that the magnetorotational instability (MRI) is likely the mechanism of angular momentum transport and accretion has led to rapid progress in the theory of black hole accretion. General relativistic MHD ... -
Real-Time Core-Hole Dynamics in X-ray Spectroscopy
While experimental developments have enabled the study of core-hole dynamics in X-ray spectroscopy, theoretical methods for dynamical effects are still underdeveloped. Additionally, traditional theoretical methods are in ... -
Recent Progress in Quantum Gravity: Karch-Randall Braneworld, Entanglement Islands and Graviton Mass
In this thesis, we review important recent progress in our understanding of entanglement islands and quantum gravity. We illustrate the concept of entanglement island and its implications to the black hole information ... -
Reduced Limit on the Permanent Electric Dipole Moment of 199 Hg
This thesis describes an experiment to measure the permanent electric dipole moment (EDM) of 199Hg. The EDM is manifested as a small perturbation to the Larmor precession frequency due to the interaction energy of the ... -
Relative Cross Section Measurment of Inclusive Charged Current Multiple Pion Production to Inclusive Charged Current from Muon Neutrinos at the Near Detector of the T2K Experiment
The Tokai-to-Kamiokande (T2K) experiment is an off-axis, long baseline neutrino oscillation experiment based in Japan. One of the largest sources of systematic uncertainty in the oscillation analysis is the uncertainty on ... -
Research on student understanding of quantum mechanics as a guide for improving instruction
(2007)This dissertation reports on an investigation of student understanding of topics in quantum mechanics that are at a level appropriate for the third year of undergraduate study. Initially, the focus was on student ability ... -
Results from a 3.1 kg day Target Exposure with Skipper CCDs from DAMIC at SNOLAB and other Beyond the Standard Model Searches with Semiconductor Detectors
We present here progress on a dark matter (DM) and neutrionless double beta decay (\nldbd) experimental search. We constrained the WIMP-nucleon scattering cross section $<9 \ \rm GeV / c^2$ in a silicon target with an 11 ... -
Reversibility of Sea Ice and Climate under Global Change
(2012-09-13)We present work on several topics in physical climatology. Motivated by recent satellite observations of Arctic sea ice age, we investigate how the properties of first-year and multiyear ice regulate sea ice area and volume. ... -
Rotating Torsion Balance Tests of the Weak Equivalence Principle
We used a rotating torsion balance to make the most precise laboratory search for equivalence-principle violation. We used a beryllium-aluminum composition dipole to complement our previous measurement with a beryllium-titanium ... -
Rotationally equivariant learning of generalizable protein structure-to-function maps
Proteins play a central role in biology from immune recognition to brain activity. Although major advances in machine learning have improved our ability to predict protein structure from sequence, determining protein ... -
Scaling and phase transitions in one-dimensional nonequilibrium driven systems
(2003)We investigate scaling and phase transitions in 1D driven lattice gas models, related to Kardar-Parisi-Zhang (KPZ) surface dynamics. The results of three studies are presented. In the first one, we generalize the asymmetric ... -
Search for associated production of Z and Higgs bosons in proton-antiproton collisions at 1.96 TeV.
(ProQuest Information and Learning, 2010)We present a search for associated production of Z and Higgs bosons in 4.2/fb of ppbar collisions at sqrt{s} = 1.96 TeV, produced in RunII of the Tevatron and recorded by the D0 detector. The search is performed in ... -
A search for astrophysical point sources of neutrinos with Super-Kamiokande
(2002)Using a data sample of 2037 upward-going muons gathered by the Super-Kamiokande detector during 1479.6 days of average effective live time between April 1, 1996, and December 8, 2000, a search for evidence of astrophysical ...