Alumni
Stephen Albright Charles Ahn 
Undecided Ultrathin 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 twodimensional materials properties that have been shown to exhibit novel electronic phenomena, including superconductivity and nontrivial topology. These properties are both intrinsically valuable to our continuing fundamental understanding of electronic behavior in materials and potentially useful in developing nextgeneration electronic devices. In this dissertation I describe... more 

Supraja Balasubramanian Bonnie Fleming 
Postdoctoral Associate Fermi National laboratory A Diﬀerential CrossSection Measurement of Muon NeutrinoInduced 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 lowenergy excess of electromagnetic events observed by MiniBooNE, study neutrinoargon interactions, and conduct research and development for future largescale argon based detectors such as DUNE. A signiﬁcant background for MicroBooNE’s νe appearance measurement... more 

Estella Barbosa de Souza Reina Maruyama 
Consultant Boston Consulting Group A ModelIndependent Search for Dark MatterInduced Annual Modulation Signal with the COSINE100 Experiment 

Joshua Burt John Murray 
Undecided LargeScale 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 multiscale architecture. Yet there remains a major disconnect in linking largescale dynamics of networked neural systems to their underlying circuit mechanisms. Biophysicallybased computational modeling of... more 

Shany Danieli Pieter van Dokkum 
NASA Hubble and CarnegiePrinceton Postdoctoral Fellow Institute for Advanced Study Website Clues to the Nature of Dark Matter from LowMass 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 Michel Devoret 
Postdoctoral Associate Yale University, Applied Physics Realization of an Andreev spin qubit: Exploring the subgap 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 groundstate properties of millions of Andreev levels acting in concert. Yet fundamentally, each... more 

Judith Hoeller Nicholas Read 
Postdoctoral Associate TBD 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 Yoram Alhassid 
Postdoctoral Associate University of Illinois, UrbanaChampaign Lattice AuxiliaryField Quantum Monte Carlo Studies of the Unitary Fermi Gas The BardeenCooperSchrieffer (BCS) to BoseEinstein 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 swave 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 A. Douglas Stone 
Data Scientist VideaHealth Electromagnetic Eigenvalue Problems and Nonhermitian Effects in Linear and Saturable Scattering In this thesis we address a series of new problems in nonhermitian 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 impedancematched 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 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 

Mengzhen Zhang A. Douglas Stone 
Postdoctoral Associate University of Chicago Properties and Applications of Gaussian Processes Gaussian states, operations, and measurements are central building blocks for continuousvariable quantum information processing which paves the way for abundant applications, especially including networkbased quantum computation and communication. To make the most use of the Gaussian processes, it is required to understand and utilize suitable mathematical tools such as the symplectic space, symplectic algebra, and Wigner representation. Applying these mathematical tools to practical quantum... more 
Robert Blum Sean Barrett 
Postdoctoral Associate (Barrett) Yale University Applying novel NMR techniques to manybody spin systems, and novel reconstruction techniques to NMR data This experimental thesis focuses on two distinct themes: developing NMR techniques to probe manybody spin systems, and extracting the maximum amount of information from the minimum amount of data. For the first theme, I describe the first NMR observations of discrete time crystal signatures. A discrete time crystal (DTC) is a manybody quantum state where a driven system exhibits discrete time translational symmetry breaking. A surprising aspect of our DTC signatures is that they were detected... more 

Luke Burkhart Rob Schoelkopf 
Postgraduate Associate Yale University, Applied Physics ErrorDetected Networking for 3D Circuit Quantum Electrodynamics Quantum machines have the potential to serve as groundbreaking tools for scientific discovery in the coming decades. As the complexity of these devices increases, it may be necessary to borrow ideas from complex classical systems, and build them in a modular fashion, with independently designed, optimized, and tested components, networked together into a functioning whole. To build a modular machine from superconducting circuits requires the ability to perform operations between quantum bits... more 

Christopher Davis Reina Maruyama 
Senior Data Scientist CarMax Search for Neutrinoless Double Beta Decay with Majoron Emission in CUORE This thesis describes a search performed at the Cryogenic Underground Observatory for Rare Events (CUORE) for Majoronemitting neutrinoless doublebeta decays. A discovery of any form of neutrinoless doublebeta decay would be of immense importance to the field of physics, as any mechanism by this decays occurs would require physics beyond the Standard Model. In addition, neutrinoless doublebeta decays, including type I Majoron models, would show that lepton number is not a conserved... more 

Arpit Dua Meng Cheng & Liang Jiang 
UQMIQIM Postdoctoral scholar Caltech Structure of fracton stabilizer models In recent years the study of topological phases of matter has moved to the forefront of theoretical condensed matter physics. This has been fueled in part by the theorized existence of exotic phases of matter that can serve as topological quantum memories and computers. The classification of topological phases of matter in two spatial dimensions in terms of anyon theories, or modular tensor categories, and chiral central charges forms the cornerstone of the subject. For the special case of 2D... more 