# Alumni

 Shantanu MundhadaMichel Devoret Quantum EngineerQuantum Circuit, Inc.Hardware-efficient autonomous quantum error correctionThe promise of quantum speedup in information processing is not yet fulfilled in a useful quantum algorithm due to the susceptibility of quantum information to decoherence. This makes quantum error correction (QEC) a vital area of research. The vast majority of QEC protocols, however, come with an overwhelming hardware and software overhead. For superconducting quantum circuits, it is possible to minimize this overhead by hardware-efficient encoding in infinite dimensional Hilbert spaces of... more Kyungjoo NohLiang Jiang Quantum Research ScientistAmazon Web ServicesWebsiteQuantum computation and communication in bosonic systemsQuantum computation and communication are important branches of quantum information science. However, noise in realistic quantum devices fundamentally limits the utility of these quantum technologies. A conventional approach towards large-scale and fault-tolerant quantum information processing is to use multi-qubit quantum error correction (QEC), that is, to encode a logical quantum bit (or a logical qubit) redundantly over many physical qubits such that the redundancy can be used to detect... more Brooke RussellBonnie Fleming Owen Chamberlain Postdoctoral FellowLawrence Berkeley National Laboratory An Electron Neutrino Appearance Search in MicroBooNE with 5$\times$10$^{19}$ POTMicroBooNE is a single-phase liquid argon time projection chamber (LArTPC) short-baseline accelerator neutrino experiment located at Fermi National Accelerator Laboratory in the Booster Neutrino Beam. MicroBooNE's foremost scientific objective is to definitively resolve the low-energy excess of single shower electromagnetic events seen by the precursor MiniBooNE experiment. This thesis examines a small fraction of early MicroBooNE data. By leveraging fine-grained drifted ionization... more Tong ShuJames Rothman Postdoctoral AssociateInstitute of System Genetics in NYU School of MedicineMolecular Mechanisms of Regulated SNARE Assembly Revealed by Single-Molecule Force SpectroscopyNeurons in the brain communicate with each other by release of neurotransmitters at synaptic junctions. Neurotransmitter release is mediated by three membrane-anchored SNARE proteins (soluble N-ethylmaleimide sensitive factor attachment protein receptors) and various regulatory proteins, including Munc13-1, Munc18-1, Synaptotagmin, complexin, NSF (N-ethylmaleimide sensitive factor) and SNAP (soluble NSF attachment protein). By forming proper SNARE complex, SNARE proteins couple their folding... more Shilo XiaDavid C. Moore Chamberlain FellowLBNLSearch for Neutrinoless Double Beta Decay and Detector Physics Measurements with the Final EXO-200 DatasetLiquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. This work presents the latest results from the EXO-200 experiment, which searched for neutrinoless double beta decay (0$\nu\beta\beta$) in $^{136}$Xe between 2011 and 2018. With upgraded hardware, increased exposure and analysis improvements, the detector resolution, sensitivity and final data limit were also improved over time. Taking advantage of a single-phase, large detector with good purity... more
 Tonima Tasnim AnannaMeg Urry Postdoctoral AssociateDartmouth CollegeACCRETION HISTORY OF AGN: X-RAY POPULATION SYNTHESIS MODEL & MULTIWAVELENGTH PHOTOMETRIC REDSHIFTSA new X-ray population synthesis model, its physical implications, along with detailed analysis of AGN X-ray spectral parameter space are presented in this work. This population synthesis model uniquely fits all the newest observed constraints from high energy X-ray bands such as NuSTAR and Swift-BAT, and predicts a Compton-thick fraction of 50−56% in the local Universe. The new X-ray population synthesis model was computed using a neural network. Given an input distribution of AGN... more Charles BrownJack Harris Postdoctoral AssociateUniversity of California, BerkeleyOptical, Mechanical and Thermal Properties of Superfluid Liquid Helium Drops Magnetically-Levitated in VacuumThe field of optomechanics studies the interactions between light and the motion of an object. One of the goals in this field is to generate and control highly non-classical motion of a massive mechanical oscillator. There has been progress in generating such non-classical motion via coupling the oscillator to a qubit, or by utilizing the non-linearity of single photon detection. However, interest still remains in generating non-classical motion directly via the optomechanical interaction... more Christopher DavisReina Maruyama Senior Data ScientistCarMaxSearch for Neutrinoless Double Beta Decay with Majoron Emission in CUOREThis thesis describes a search performed at the Cryogenic Underground Observatory for Rare Events (CUORE) for Majoron-emitting neutrinoless double-beta decays. A discovery of any form of neutrinoless double-beta 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 double-beta decays, including type I Majoron models, would show that lepton number is not a conserved... more James IngoldbyThomas Appelquist Postdoctoral ResearcherICTP in Trieste ItalyEFTs for Nearly Conformal Gauge TheoriesThe phenomena of electricity and magnetism, beta decay in radioactive nuclei, and the confinement of quarks within the proton can each be explained using the three different gauge theories which collectively make up the standard model. Alternative gauge theories display new kinds of exotic phenomena, which are not fully understood. For example, if the field content is chosen appropriately, a gauge theory is said to be in the conformal window, and can acquire conformal symmetry. In this case,... more Prashanta KharelPeter Rakich Device Lead and Founding Team MemberHyperlight CorporationUtilizing Brillouin Interactions for Optical Control of Bulk Acoustic Waves.The interaction between light and mechanical motion has been harnessed for a variety of scientific and technological applications ranging from studies of decoherence to precision metrology and quantum information.  Building on these accomplishments, optomechanical systems show great potential for various classical and quantum applications, including ultra-low-noise oscillators and high-power lasers to quantum transducers and quantum memories. Central to these goals of optomechanics, and... more Stefan KrastanovLiang Jiang Postdoctoral AssociateTBDWebsiteNew Approaches to Control, Calibration, and Optimization of Quantum HardwareIn this dissertation I present a number of techniques that form building blocks for the quantum manipulations spanning various levels of the quantum technology stack. We begin at the very bottom, with techniques for the universal control of a quantum harmonic oscillators. Oscillators like microwave and optical cavities are among some of the more promising physical systems on top of which to implement quantum logic. However, most of our technology until recently has been focused on manipulating... more Danielle NorciniKarsten Heeger KICP and Grainger Fellow University of ChicagoA search for eV-scale sterile neutrinos and precision measurement of the U-235 antineutrino spectrum with the PROSPECT experimentReactor experiments have been devoted to establishing the properties of the weakly-interacting neutrino. Recent neutrino oscillation experiments at low-enriched uranium (LEU) reactors suggest a disagreement between the observed electron antineutrino flux and energy spectrum when compared to leading model predictions. The ~6% flux deficit, known as the Reactor Antineutrino Anomaly, measured by detectors with baselines <500 m can be explained by the addition of a beyond-the-Standard-Model... more Susan PrattSimon Mochrie Law School StudentGeorgetown UniversityDevelopment and implementation of a reversibly-interacting TRAP-peptide pair as a live-cell imaging strategyThe need to study proteins in living cells to acquire accurate information pertaining to their spatiotemporal dynamics drives the development and improvement of tools for visualization. Unfortunately, there does not exist a 'one size fits all' imaging strategy, leading to the continuous pursuit of new labeling and optical methods, with the goal of developing more widely applicable approaches that minimally disrupt the biological systems studied. Tetratricopeptide repeat affinity... more Jared RovnySean Barrett Princeton Quantum Institute Postdoctoral FellowFASPHY PhysicsNew NMR Applications and Methods: Discrete Time Crystalline Signatures and Accelerated Acquisition using Iterated MapsThis thesis describes two distinct research endeavors linked by nuclear magnetic resonance (NMR) experiments. One is related to the nascent study of discrete time crystals (DTCs) in driven quantum systems. In this thesis I describe the first NMR studies of DTC signatures in solids, characterizing the DTC signatures we observed in a crystal of ammonium dihydrogen phosphate, where we addressed nuclear spins of phosphorus 31P and hydrogen 1H. I also describe the methods we used to demonstrate... more Clarke SmithMichel Devoret Postdoctoral FellowInriaDesign of Protected Superconducting QubitsControllable quantum systems that are shielded at a Hamiltonian level from the random fluctuations of their environments could provide a valuable resource for quantum information science. While these "protected qubits" promise unprecedentedly low error rates, this might come at the expense of ease of physical implementation. This thesis focuses on overcoming this apparent design problem in protected qubits within the context of superconducting circuits and their quantized... more