Degree Date: May, 2021
Ryan Petersburg's picture
Ryan Petersburg
Debra Fischer
Senior Professional Staff 1

Johns Hopkins Applied Physics Laboratory

Exoplanet Measurement to the Extreme: Novel Methods of Instrumentation and Data Extraction for Radial-velocity Spectrographs
The current generation of radial-velocity spectrographs are at the precipice of discovering a multitude Earth-like exoplanets orbiting in the habitable zones of nearby stars. Such detections require Doppler precision of approximately 10 cm s^{-1), an order of magnitude better than the typical best-case measurement from the previous generation of instruments. Therefore, the radial-velocity community requires research and innovation from all angles to push our technology over the brink. This... more
Mariel Pettee's picture
Mariel Pettee
Sarah Demers
Chamberlain Fellow

Berkeley Lab

Interdisciplinary Machine Learning Methods for Particle Physics
Following the discovery of a Higgs boson-like particle in the summer of 2012 at the Large Hadron Collider (LHC) at CERN, the high-energy particle physics community has prioritized its thorough study. As part of a comprehensive plan to investigate the many combinations of production and decay of the Standard Model Higgs boson, this thesis describes a continued search for this particle produced in association with a leptonically-decaying vector boson (i.e. a W or Z boson) and decaying into a pair... more
Daniel Seara's picture
Daniel Seara
Michael Murrell
Postdoctoral Fellow

University of Chicago

Energetics of biological mechanics and dynamics
Living matter is a class of soft matter systems that microscopically consumes energy to drive essential life processes such as replication, migration, and shape change at the scale of both single cells and multicellular tissues. While much work has been done to understand the molecular processes underlying such behaviors, we lack a general understanding of how the microscopic breaking of detailed balance translates to large-scale cellular behaviors and materials properties. Using the tools of... more
Christian Weber's picture
Christian Weber
Keith Baker
Research Associate Physics

Brookhaven National Lab

New Search for H→ZZ_d→4l using pp collision data at √s=13 TeV with the ATLAS detector
In 2012 the ATLAS and CMS experiments both reported the discovery of a new particle in the remnants of high-energy proton-proton collisions. The particles properties were consistent with the ones of the Standard Model Higgs boson. Its discovery, 58 years after its postulation, marked the completion of the Standard Model of Particle Physics.   Subsequent data taking at both experiments continued to record Higgs boson decays. With this increased dataset, we are now... more
Sisi Zhou's picture
Sisi Zhou
Liang Jiang
IQIM Postdoctoral Scholar

California Institute of Technology

Error-corrected quantum metrology
Quantum metrology, which studies parameter estimation in quantum systems, has many applications in science and technology ranging from frequency spectroscopy to gravitational wave detection. Quantum mechanics imposes a fundamental limit on the estimation precision, called the Heisenberg limit (HL), which bears a quadratic enhancement over the standard quantum limit (SQL) determined by classical statistics. The HL is achievable in ideal quantum devices, but is not always achievable in presence... more
Degree Date: December, 2020
Stephen Albright's picture
Stephen Albright
Charles Ahn

Ultra-thin Film Growth of Chalcogenides to Realize Novel Electronic Phenomena
Chalcogenides, compounds containing the elements S, Se, or Te, are a class of materials that includes those with two-dimensional materials properties that have been shown to exhibit novel electronic phenomena, including superconductivity and non-trivial topology. These properties are both intrinsically valuable to our continuing fundamental understanding of electronic behavior in materials and potentially useful in developing next-generation electronic devices. In this dissertation I describe... more
Supraja Balasubramanian's picture
Supraja Balasubramanian
Bonnie Fleming
Postdoctoral Associate

Fermi National laboratory

A Differential Cross-Section Measurement of Muon Neutrino-Induced Charged Current Neutral Pion Production in MicroBooNE
MicroBooNE is a liquid argon time projection chamber (LArTPC) on the Booster Neutrino Beam at Fermi National Laboratory. Its primary goals are to conduct a νe appearance search to investigate the nature of the anomalous low-energy excess of electromagnetic events observed by MiniBooNE, study neutrino-argon interactions, and conduct research and development for future large-scale argon based detectors such as DUNE. A significant background for MicroBooNE’s νe appearance measurement... more
Estella Barbosa de Souza's picture
Estella Barbosa de Souza
Reina Maruyama

Boston Consulting Group

A Model-Independent Search for Dark Matter-Induced Annual Modulation Signal with the COSINE-100 Experiment
Joshua Burt's picture
Joshua Burt
John Murray

Large-Scale Organization of Microcircuit Specialization in Human Cortex
Neural circuit dynamics across a range of spatiotemporal scales endow the brain with specialized computational capabilities that subserve human cognition and behavior. Technological advances and big data initiatives in recent years have revolutionized our understanding of the brain’s multi-scale architecture. Yet there remains a major disconnect in linking large-scale dynamics of networked neural systems to their underlying circuit mechanisms. Biophysically-based computational modeling of... more
Shany Danieli's picture
Shany Danieli
Pieter van Dokkum
NASA Hubble and Carnegie-Princeton Postdoctoral Fellow

Institute for Advanced Study

Clues to the Nature of Dark Matter from Low-Mass Galaxies Outside the Local Group
The primary motive for this thesis is the highly uncertain nature of dark matter, presumably the dominant substance in our universe. From an astronomical perspective, perhaps the perfect laboratories for investigating the nature of dark matter on small scales are low surface brightness, low mass galaxies. They are the most abundant type of galaxy in the universe. In the Local Group, they are found to be dark matter dominated and thus have larger portions of dark matter for their total mass. And... more
Max Hays's picture
Max Hays
Michel Devoret
Postdoctoral Associate

Yale University, Applied Physics

Realization of an Andreev spin qubit: Exploring the sub-gap structure of Josephson nanowires using circuit QED
A weak link between two superconductors hosts discrete, fermionic modes known as Andreev levels. They govern the physics of the weak link on the microscopic scale, ultimately giving rise to macroscopic phenomena such as the Josephson supercurrent. Conventional superconducting quantum circuits crucially rely on the nonlinearity of the supercurrent in Josephson tunnel junctions, which arises from the ground-state properties of millions of Andreev levels acting in concert. Yet fundamentally, each... more
Judith Hoeller's picture
Judith Hoeller
Nicholas Read
Postdoctoral Associate


Topological quantization of Berry phases in quantum and classical systems
Berry phases are known to occur for a spin 1/2 in a slowly varying magnetic field in quantum mechanics, and for the polarization of light in a gently twisted optical fiber in classical optics. Such Berry phases take on continuous values. I describe two systems in which Berry phases are topologically quantized to discrete values: (1) cold atoms in accelerated optical lattices, and (2) dissipative two level systems coupled to radiation with a slowly varying phase offset. (1) Cold atoms in... more
Scott Jensen's picture
Scott Jensen
Yoram Alhassid
Postdoctoral Associate

University of Illinois, Urbana-Champaign

Lattice Auxiliary-Field Quantum Monte Carlo Studies of the Unitary Fermi Gas
The Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein condensate (BEC) crossover has been experimentally realized using Feshbach resonance techniques with ultracold atomic Fermi gases of 6Li and 40K. In the middle of this crossover is the unitary Fermi gas (UFG), in which the s-wave scattering length diverges and interactions are strongest. The UFG has many interesting properties including a particularly high critical temperature for superfluidity Tc ~ 0.15 TF (in units of the Fermi temperature... more
William Sweeney's picture
William Sweeney
A. Douglas Stone
Data Scientist


Electromagnetic Eigenvalue Problems and Nonhermitian Effects in Linear and Saturable Scattering
In this thesis we address a series of new problems in non-hermitian optical scattering – linear and nonlinear – with increasing degrees of complexity. We develop the theory of reflectionless scattering modes (RSMs), introducing a novel and broad class of impedance-matched eigenproblems: for a given structure, find the incident wavefronts and frequencies which are not partially reflected at all, but are instead transmitted through the scatterer, or dissipated within it. The RSM... more
Hao Yan's picture
Hao Yan
Simon Mochrie

Positional Fluctuations in Synthetic and Living Polymer Systems
Chromatin organization is inextricably linked to its dynamics. The loop extrusion factor (LEF) model provides a framework for how topologically associating domains (TADs) arise: cohesin or condensin extrude DNA loops, until they encounter boundary elements, namely CTCF. However, a characteristic subdiffusive behavior of MSD is observed in fission yeast on the seconds timescale and experiments show that cohesin or condensin largely constrains chromatin mobility. Such finding is inconsistent with... more