Alumni
Han Aung Daisuke Nagai 
Postdoctoral Associate Hebrew University of Jerusalem Website Cosmology and Astrophysics with Dark Matter and Gaseous Halos Multiwavelength 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 nonlinear growth of structures and the effects of small scale astrophysics in the realistic cosmological settings. Specifically... more 

Kelly Backes Steve Lamoreaux 
Quantum Sensor and Security Specialist MITRE Corporation A quantumenhanced 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 chargeparity (CP) problem of quantum chromodynamics. The detection of these dark matter axions is made difficult by... more 

Paul Fanto Yoram Alhassic 
Research Staff Member Institute for Defense Analyses  System Evaluation Division Statistical properties of nuclei: beyond the meanfield approximation The statistical model of compoundnucleus 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 randommatrix theory; and (ii) statistical properties of nuclei, i.e., nuclear structure observables that determine statisticalmodel predictions of reaction rates. The GOE... more 

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 socalled datainput 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 highlyspecialized device called a... more 

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 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 YangMills theory and dilaton... more 
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 John Wettlaufer 
Wissenschaftlicher Mitarbeiter/postdoc Universiät Magdeburg Frictional, LargeDeformation Poroelastic Flow: Theory and Experiments Fluid flow through deformable, porous materials is seemingly ubiquitous in the natural worldspanning length scales from the cellular to the planetaryand offers a phenomenologically rich setting in which to study the generally nonlinear coupling between solid and fluidmechanics 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 Debra Fischer 
Senior Professional Staff 1 Johns Hopkins Applied Physics Laboratory Exoplanet Measurement to the Extreme: Novel Methods of Instrumentation and Data Extraction for Radialvelocity Spectrographs The current generation of radialvelocity spectrographs are at the precipice of discovering a multitude Earthlike 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 bestcase measurement from the previous generation of instruments. Therefore, the radialvelocity community requires research and innovation from all angles to push our technology over the brink. This... more 

Mariel Pettee Sarah Demers 
Chamberlain Fellow Berkeley Lab Interdisciplinary Machine Learning Methods for Particle Physics Following the discovery of a Higgs bosonlike particle in the summer of 2012 at the Large Hadron Collider (LHC) at CERN, the highenergy 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 leptonicallydecaying vector boson (i.e. a W or Z boson) and decaying into a pair... more 

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 largescale cellular behaviors and materials properties. Using the tools of... more 

Olivier Trottier Joe Howard 
Undecided 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 twodimensional sensory neurons that develop a complex dendritic arbor sensitive to mechanical stimuli. The fullydeveloped dendritic tree results from a multitude of stochastic processes including dendritic tip growth, branching and selfavoidance. However, it is yet unknown how the microscopic dendritic growth processes produce the macroscopic... more 

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 highenergy protonproton 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 Liang Jiang 
IQIM Postdoctoral Scholar California Institute of Technology Errorcorrected 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 David DeMille 
Postdoctoral Associate (Reina Maruyama) FASPHY Physics Experiments with 87Rb: Towards Cotrapping 88Sr19F and 87Rb Polar molecules can interact via the anisotropic and long ranged electric dipoledipole 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 subDoppler temperature (~10 μK) achieved with laser cooling by polarization gradients, we hope to... more 