Degree Date: December, 2021
Han Aung's picture
Han Aung
Daisuke Nagai
Postdoctoral Associate

Hebrew University of Jerusalem

Cosmology and Astrophysics with Dark Matter and Gaseous Halos
Multi-wavelength astronomical surveys promise to provide unprecedented data on dark matter halos from galactic to cluster scales in the coming decade. One of the new frontiers lies in studies of intracluster medium (ICM) and circumgalactic medium (CGM) for cosmology and galaxy formation. In this work, we will combine cosmological and idealized simulations to study the non-linear growth of structures and the effects of small scale astrophysics in the realistic cosmological settings. Specifically... more
Kelly Backes's picture
Kelly Backes
Steve Lamoreaux
Quantum Sensor and Security Specialist

MITRE Corporation

A quantum-enhanced search for dark matter axions
Almost a century after the dark matter problem was first posed, dark matter’s expectedly minute experimental signature continues to elude direct detection and remains one of the most profound mysteries in fundamental physics. The QCD axion serves as a potential solution to the dark matter problem as well as an entirely unrelated problem in fundamental physics: the strong charge-parity (CP) problem of quantum chromodynamics. The detection of these dark matter axions is made difficult by... more
Paul Fanto's picture
Paul Fanto
Yoram Alhassic
Research Staff Member

Institute for Defense Analyses -- System Evaluation Division

Statistical properties of nuclei: beyond the mean-field approximation
The statistical model of compound-nucleus reactions has important applications in fundamental nuclear science, nuclear astrophysics, and nuclear technology. This model relies on two theoretical areas: (i) statistical reaction theory, which describes the compound nucleus with the Gaussian orthogonal ensemble (GOE) of random-matrix theory; and (ii) statistical properties of nuclei, i.e., nuclear structure observables that determine statistical-model predictions of reaction rates. The GOE... more
Connor Hann's picture
Connor Hann
Steven Girvin
Research Scientist

Amazon Web Services Center for Quantum Computing

Practicality of Quantum Random Access Memory
Quantum computers are expected to revolutionize the world of computing, but major challenges remain to be addressed before this potential can be realized. One such challenge is the so-called data-input bottleneck: Even though quantum computers can quickly solve certain problems by rapidly analyzing large data sets, it can be difficult to load this data into a quantum computer in the first place. In order to quickly load large data sets into quantum states, a highly-specialized device called a... more
Sangjae Lee's picture
Sangjae Lee
Charles Ahn
Postdoctoral Assoicate

Seoul National University

Physics of the Electronic Structure and Collective Excitations in Transition Metal Compounds
In condensed matter systems novel phenomena such as superconductivity and magnetism can emerge from an intricate interplay between the materials lattice, spin, charge, and orbital degrees of freedom. Understanding how the structural and electronic degrees of freedom are coupled in transition metal compounds is crucial not only from the viewpoint of fundamental condensed matter physics, but also to establish a potential groundwork for substantial technological advancement through the discovery... more
Jingping Li's picture
Jingping Li
Walter Goldberger
Postdoctoral Assoicate

Carnegie Mellon University

The Wordline Effective Field Theory of Spinning Gravitational Sources
The advent of gravitational wave physics has raised great interest in efficient calculations of gravitational dynamics. In particular, the worldline effective field theory (EFT) has proven to be powerful for describing the dynamics of compact binary inspirals. In this thesis, we report on progress in this method on including rotating gravitational sources. It has been shown that a connection exists between the radiative amplitudes from spinless classical sources in Yang-Mills theory and dilaton... more
Degree Date: May, 2021
Soner Albayrak's picture
Soner Albayrak
David Poland
Postdoctoral Researcher

University of Amsterdam

Analytic Studies of Fermions in Conformal Bootstrap
In this thesis, we analyze unitary conformal field theories in three dimensional spaces via analytic techniques of conformal bootstrap program through correlation functions of nonscalar operators, in particular Majorana fermions. Via the analysis of these correlation functions, we access several sectors in the spectrum of conformal field theories that have been previously unexplored with analytic methods, and we provide new data for several operator families. In the first part of the thesis, we... more
Tyler Lutz's picture
Tyler Lutz
John Wettlaufer
Wissenschaftlicher Mitarbeiter/postdoc

Universiät Magdeburg

Frictional, Large-Deformation Poroelastic Flow: Theory and Experiments
Fluid flow through deformable, porous materials is seemingly ubiquitous in the natural world---spanning length scales from the cellular to the planetary---and offers a phenomenologically rich setting in which to study the generally nonlinear coupling between solid- and fluid-mechanics in multiphase materials. As much as we might like to study such flows in strict isolation from their environment, this thesis argues that properly accounting for forces that arise on the boundaries of such flows... more
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
Olivier Trottier's picture
Olivier Trottier
Joe Howard

Morphogenesis of class IV neurons in Drosophila melanogaster
The establishment of the neuron’s morphology is essential to its function. The class IV neurons of the Drosophila melanogaster larva are two-dimensional sensory neurons that develop a complex dendritic arbor sensitive to mechanical stimuli. The fully-developed dendritic tree results from a multitude of stochastic processes including dendritic tip growth, branching and self-avoidance. However, it is yet unknown how the microscopic dendritic growth processes produce the macroscopic... 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
Yuqi Zhu's picture
Yuqi Zhu
David DeMille
Postdoctoral Associate (Reina Maruyama)

FASPHY Physics

Experiments with 87Rb: Towards Co-trapping 88Sr19F and 87Rb
Polar molecules can interact via the anisotropic and long ranged electric dipole-dipole interaction owing to their large permanent electric dipole moments. Being able to study them in the ultracold temperature regime and at high density would allow us to study strongly correlated physics, and expand the toolbox for quantum computation. In order to reduce the temperature of SrF beyond the sub-Doppler temperature (~10 μK) achieved with laser cooling by polarization gradients, we hope to... more