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Items (1-20) out of 144 results

"A Tale of 2-Spheres": How Conformal Symmetry, Chaos, and Some Elementary Algebra Led to Insights in Black Holes and Quantum Cosmology

Description:
The unification of quantum mechanics and general relativity is the holy grail of fundamental theoretical physics. This thesis represents a small part of that effort, …
Year:
2022
Contributor:
Liu, Chang (creator)
Lowe, David (Advisor)
Jevicki, Antal (Reader)
Alexander, Stephon (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Theoretical physics
Quantum gravity
Collection:
Physics
Theses and Dissertations
Full Record

A Bayesian Approach to 21 cm Power Spectrum Estimation

Description:
The Epoch of Reionization (EoR) marks the period in the universe's history where the neutral hydrogen (HI) in the intergalactic medium became ionized by the …
Year:
2022
Contributor:
Burba, Jacob (creator)
Pober, Jonathan (Advisor)
Dell'Antonio, Ian (Reader)
Alexander, Stephon (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Physics, Astrophysics, Galaxy Clusters, Cosmology
Radio astronomy
Epoch of reionization
21cm
Collection:
Physics
Theses and Dissertations
Full Record

A Light Pulse Atom Interferometric Gravimeter in Dynamic Environments

Description:
Light pulse atom interferometry (LPAI) is a technique capable of producing incredibly accurate measurements of an atom and can be applied to many novel forms …
Year:
2025
Contributor:
Baumgart, Aaron Paul (creator)
Mitrovic, Vesna (Advisor)
Stoner, Richard (Advisor)
Hui, Aaron (Reader)
Plumb, Kemp (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Gravity--Measurement
Atom interferometry
Collection:
Physics
Theses and Dissertations
Full Record

A Multi-Dimensional Approach to the Characterization of Exoplanetary Atmospheres

Description:
Planetary atmospheres are governed by a complex interplay of chemical, radiative, and advective processes that yield an inherently three dimensional structure. Probing the three dimensional …
Year:
2019
Contributor:
Kilpatrick, Brian Michael (creator)
Tucker, Gregory (Advisor)
Dell'Antonio, Ian (Reader)
Lewis, Nikole (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Extrasolar planets
Collection:
Physics
Theses and Dissertations
Full Record

A Next Generation Analysis Pipeline for 21cm Epoch of Reionization Studies

Description:
The Epoch of Reionization (EoR) is a period during the history of the Universe that as of today has been largely unconstrained by cosmological measurements. …
Year:
2019
Contributor:
Kerrigan, Joshua (creator)
Pober, Jonathan (Advisor)
Tucker, Gregory (Reader)
Dell'Antonio, Ian (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Machine Learning
Cosmology
Radio astronomy
Epoch of reionization
21cm
Collection:
Physics
Theses and Dissertations
Full Record

A Novel Radio-Frequency Interference Flagging Technique for Radio-Interferometric Data from the Murchison Widefield Array

Description:
Radio-frequency interference detection and flagging is one of the most difficult and urgent problems in 21 cm Epoch of Reionization research. In this work, we …
Year:
2024
Contributor:
Kunicki, Theodora Cole (creator)
Pober, Jonathan (Advisor)
Tucker, Gregory (Reader)
dell'Antonio, Ian (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Radio interferometers
Radio--Interference
Collection:
Physics
Theses and Dissertations
Full Record

A Novel Swarming Bacterial Strain Exhibits Unique Biophysical and Probiotic Properties

Description:
Bacterial swarming is one of the motility types where groups of bacteria use flagella to migrate swiftly on a wet surface. Physically, swarming is a …
Year:
2021
Contributor:
Chen, Weijie (creator)
Tang, Jay (Advisor)
Pelcovits, Robert (Reader)
Mani, Sridhar (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Bacteria
bacterial motility
swarming
Collection:
Physics
Theses and Dissertations
Full Record

A Search for Exotic Particles that Decay into a Higgs Boson and a Photon with the CMS Detector at the CERN LHC

Description:
This dissertation presents a search for the signature of the production of previously unobserved particles being produced in the proton-proton collisions of the CERN Large …
Year:
2019
Contributor:
Hakala, John (creator)
Landsberg, Greg (Advisor)
Fan, JiJi (Reader)
Cutts, David (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Experimental Particle Physics
Collection:
Physics
Theses and Dissertations
Full Record

Achieving a Detection of the 21 cm Signal of the Cosmic Dark Ages: Simulation and Forecasting of a Lunar Far Side Radio Array

Description:
We have yet to observe the universe between the Cosmic Microwave Background (CMB) at z~1100 and the first galaxies at z~14, a period known as …
Year:
2026
Contributor:
Smith, Willow (creator)
Pober, Jonathan (Advisor)
Dell'Antonio, Ian (Reader)
Tucker, Greg (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Cosmology
Radio astronomy
Radio interferometers
21 cm cosmology
Lunar radio array
Collection:
Physics
Theses and Dissertations
Full Record

AI Parameter Inference for the Epoch of Reionization: Addressing Issues of Model Generalizability and Interpretability

Description:
The 21cm signal of neutral hydrogen contains a wealth of information about the poorly constrained era of cosmological history, the Epoch of Reionization (EoR). Recently, …
Year:
2026
Contributor:
Solt, Jasper (creator)
Pober, Jonathan (Advisor)
Bach, Stephen (Advisor)
Dell'Antonio, Ian (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Machine Learning
Cosmology
Artificial intelligence
Radio astronomy
Epoch of reionization
Collection:
Physics
Theses and Dissertations
Full Record

Analysis of Systematic Signals in the Epoch of Reionization Data from MWA

Description:
We present an analysis of systematic signals in the Epoch of Reionization (EoR) Data from Phase II of the Murchison Widefield Array (MWA). Prior work …
Year:
2023
Contributor:
Shi, Ruijie (creator)
Pober, Jonathan (Advisor)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Astrophysics
Cosmology
Radio astronomy
Collection:
Physics
Theses and Dissertations
Full Record

Analytical Framework to Uncover Structural Signatures from All-Atom Molecular Dynamics Simulations

Description:
Structural features of proteins often serve as signatures of their biological function and molecular binding activity. Elucidating these structural and dynamical features is essential for …
Year:
2022
Contributor:
Tang, Wai Shing (creator)
Crawford, Lorin (Advisor)
Rubenstein, Brenda (Reader)
Tang, Jay (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Computational biology
Gaussian processes
Molecular dynamics
Machine learning--Statistical methods
computational physics
Molecular Dynamics Simulation
Collection:
Physics
Theses and Dissertations
Full Record

Anodic alumina as a scalable platform for structural coloration and optical rectification

Description:
Anodized aluminum oxide (AAO) is an interesting material, occupying a unique space -- already used incredibly widely in the world, yet also commonly used for …
Year:
2017
Contributor:
Oller, Declan Danesh (creator)
Xu, Jimmy (Advisor)
Valles, James (Reader)
Mitrovic, Vesna (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Optics
Nanotechnology
Nanoscience
nanofabrication
filamentation
resistive switching
optical rectification
structural coloration
physical coloration
Fabry-Perot interferometers
fabry perot
optical cavity
optical resonator
Thin films--Optical properties
Aluminum
Aluminum alloys
anodized aluminum
aao
Aluminum--Anodic oxidation
anodic alumina
anodization
Aluminum oxide
coloration
Collection:
Physics
Theses and Dissertations
Full Record

Anomaly Detection for the CMS Pixel Detector Using Machine Learning

Description:
As data volumes in high-energy physics continue to increase, data quality monitoring becomes increasingly important, while traditional monitoring procedures are no longer sufficient on their …
Year:
2026
Contributor:
Gu, Tianshu (creator)
Gouskos, Loukas (Advisor)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Machine Learning
CMS Experiment
Anomaly Detection
Data quality monitoring
Collection:
Physics
Theses and Dissertations
Full Record

Application of Knowledge Distillation in Jet Tagging at LHC

Description:
Jet tagging is the process of identifying the particle that initiates a jet. It is a critical but challenging task in high-energy particle physics due …
Year:
2025
Contributor:
Zhou, Yuanchen (Author)
LeBlanc, Matt (Advisor)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Physics
Large Hadron Collider
LHC
Particle Physics
AI/ML
Knowledge Distillation
Jet Tagging
Jet Substructure
Collection:
Physics
Theses and Dissertations
Full Record

Applications of Entropic DNA Trapping to Studies of Giant Acceleration of Diffusion and a Novel Restriction Mapping Method

Description:
This dissertation presents two experimental studies of DNA polymers inside nanofluidic devices with well-defined topographic features. Those features include square pits and rectangular trenches etched …
Year:
2017
Contributor:
Kim, Daniel (creator)
Stein, Derek (Advisor)
Valles , James (Reader)
Pelcovits, Robert (Reader)
Matzavinos, Anastasios (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
DNA sequencing
Physics
Biophysics
Diffusion
Nonlinear systems
DNA
Collection:
Physics
Theses and Dissertations
Full Record

Applications of Multi-Modal Spectroscopic Techniques for the Study of Magnetism in Strongly Correlated Materials

Description:
A wide array of experimental probes of matter have been developed in order to gain a more accurate and complete understanding of the microscopic nature …
Year:
2025
Contributor:
Bales, Calvin (creator)
Mitrovic, Vesna (Advisor)
Plumb, Kemp (Reader)
Rubenstein, Brenda (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Magnetism
NMR
condensed matter physics
Collection:
Physics
Theses and Dissertations
Full Record

Aspects of Cosmological, Celestial and String Amplitudes

Description:
In this thesis, we present novel perspectives on the explicit evaluation and analytic structure of correlation functions and scattering amplitudes in flat and expanding spacetimes. …
Year:
2025
Contributor:
De, Shounak (creator)
Volovich, Anastasia (Advisor)
Alexander, Stephon (Reader)
Fan, JiJi (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Cosmology
scattering amplitudes
Quantum field theory
string theory
conformal field theory
Collection:
Physics
Theses and Dissertations
Full Record

Aspects of Scattering Amplitudes: Tensor Diagrams, Hyperbolic Volumes, and Celestial Sphere

Description:
In this thesis, we present studies of the structures of loop-level amplitudes in planar $\mathcal{N}=4$ supersymmetric Yang-Mills theory, via tensor diagrams and hyperbolic volumes, and …
Year:
2024
Contributor:
Ren, Lecheng (creator)
Volovich, Anastasia (Advisor)
Jevicki, Antal (Reader)
Fan, JiJi (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
scattering amplitudes
celestial holography
Collection:
Physics
Theses and Dissertations
Full Record

Bacterial Mobility in Thin Liquid Films and Near a Solid Boundary

Description:
This work consists of two main projects: the first project describes bacterial confinement within a thin but resilient layer of liquid. The second project reports …
Year:
2020
Contributor:
Araujo, George B (creator)
Tang, Jay (Advisor)
Ling, Xinsheng (Reader)
Powers, Thomas (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Biophysics
Bacteriology
Collection:
Physics
Theses and Dissertations
Full Record

Items (1-20) out of 144 results