Degree Date: December, 2017
Evan Pease's picture
Evan Pease
Dan McKinsey
Senior Data Analyst

Cisco Meraki

Rare-event searches in liquid xenon with the LUX and LUX-ZEPLIN detectors
Liquid xenon has been used with great success in recent attempts to directly detect dark matter particles. The Large Underground Xenon (LUX) experiment recently concluded nearly four years of underground operations at the Sanford Underground Research Facility in Lead, South Dakota. The final 332 live-days of data were acquired with time-varying detector conditions, which required frequent calibrations and new data quality studies beyond those used for the results from the initial 95-live-day... more
Alexey Shkarin's picture
Alexey Shkarin
Jack Harris
Postdoctoral Fellow

Max Planck Institute for the Science of Light

Quantum Optomechanics with Superfluid Helium
The field of optomechanics deals with the interaction between light and mechanical objects. One of the goals in this field is to gain ability to coherently manipulate mechanical states with single-quantum precision and to interface these states with electromagnetic radiation without loss. Recent achievements enabled by this power include cooling of the mechanical oscillator to its quantum ground state, generating optical or mechanical squeezing, or entangling mechanical and optical degrees of... more
Brian Tennyson's picture
Brian Tennyson
Daniel McKinsey
Sensor Systems Engineer


Two Phase Liquid-Gas Xenon Time Projection Chambers: Theory, Applications, and Analysis
Two phase liquid-gas xenon-based detectors employ liquified xenon as the primary detector medium and are able to reconstruct the position and energy of interactions within the detector. These detectors are sensitive to a wide variety of particles, including gamma and beta emissions and neutrinos. They are also hypothetically sensitive to WIMP (Weakly Interacting Massive Particle) dark matter. This dissertation presents the contributions made by the author to three projects using this type of... more
Uri Vool's picture
Uri Vool
Michel Devoret
Postdoc fellow (JHDSF)

Harvard University

Engineering synthetic quantum operations
Coherent quantum effects are the hallmark of atomic systems. The field of circuit quantum electrodynamics (cQED) also allows for the control of coherent quantum systems. However, these quantum states do no correspond to atomic degrees of freedom, but to the quantized behavior of the electromagnetic field in a marcoscopic superconducting circuit. These "artificial atoms" simulate many of the effects in atomic systems, with the added benefits of tunability and fast control and... more
Degree Date: May, 2017
Corey Adams's picture
Corey Adams
Bonnie Fleming

First Detection of Low Energy Electron Neutrinos in Liquid Argon Time Projection Chambers
Electron neutrino appearance is the signature channel to address the most pressing questions in neutrino oscillations physics, at both long and short baselines. This includes the search for CP violation in the neutrino sector, which the U.S. flagship neutrino experiment DUNE will address. In addition, the Short Baseline Neutrino Program at Fermilab (MicroBooNE, SBND, ICARUS-T600) searches for new physics, such as sterile neutrinos, through electron neutrino appearance. Liquid argon time... more
Victor Albert's picture
Victor Albert
Liang Jiang
Postdoctoral Associate


Lindbladians with multiple steady states: theory and applications
Lindbladians, one of the simplest extensions of Hamiltonian-based quantum mechanics, are used to describe decay and decoherence of a quantum system induced by that system's environment. Traditionally, an environment is viewed as detrimental to fragile quantum properties. Nevertheless, it offers the ability to drive the system toward exotic phases of matter, which may be difficult to stabilize in nature, or toward protected subspaces, which can be used to store and process quantum... more
Marco Bonett-Matiz's picture
Marco Bonett-Matiz
Yoram Alhassid
Teacher Summer Programs

Yale University

Statistical and Spectroscopic Properties of Nuclei in the Shell Model Monte Carlo Method
The predictive power of the interacting shell model in describing properties of nuclei is restricted by the limitations of conventional diagonalization techniques. The shell model Monte Carlo (SMMC) method allows the calculation of thermal properties in very large model spaces, much beyond what is possible with exact diagonalization. In particular, the SMMC has become the state-of-the-art method for the calculation of statistical properties of nuclei. The total state density that is... more
Mehmet Dogan's picture
Mehmet Dogan
Sohrab Ismail-Beigi
Postdoctoral researcher

University of California, Berkeley

Ab initio studies of ferroelectric thin films
Epitaxial interfaces between metal oxides and semiconductors have been of significant research interest due to their potential use in electronic device applications. Thin films of metal oxides can display many functional physical properties, an important example of which is ferroelectricity. Ferroelectric thin metal oxide films grown on semiconductors can enable non-volatile transistors, where the state of the device is encoded in the polarization state of the oxide which determines the... more
Alexandru Bogdan Georgescu's picture
Alexandru Bogdan Georgescu
Sohrab Ismail-Beigi

New Methods and Phenomena in The Study of Correlated Complex Oxides
Transition metal oxides have long been an important subject of study, both theoretically and experimentally. The wide array of phases possible in their bulk forms (high T$_c$ superconductivity, colossal magnetoresistance, ferroelectricity, etc.) makes them of scientific and technological significance, while relatively recent materials deposition techniques have allowed researchers to grow new, 'artificial' materials in the form of heterostructures and thin films. These structures offer... more
Peiyuan Mao's picture
Peiyuan Mao
Meg Urry
Quantitative Researcher

Akuna Capital

Blazar Demographics: Intrinsic Properties of Jet-Dominated Active Galactic Nuclei
Blazars with their Doppler-boosted relativistic jets are perfect laboratories to study jet physics and provide crucial insights into jet mechanism, black hole spin, and growth history of the host galaxy. However, the blazar samples we observe are highly biased subsets of the true population because of the complicated shape of their spectral energy distributions. Thus to infer the intrinsic properties of blazars we have to extrapolate from the biased samples — and there are two opposing... more
Brendon O'Leary's picture
Brendon O'Leary
David DeMille

In search of the electron's electric dipole moment in thorium monoxide: an improved upper limit, systematic error models, and apparatus upgrades
Searches for violations of discrete symmetries can be sensitive probes of physics beyond the Standard Model. Many models, such as supersymmetric theories, introduce new particles at higher masses that include new CP-violating phases which are thought to be of order unity. Such phases could generate measurable permanant electric dipole moments (EDMs) of particles. The ACME collaboration has measured the electron’s EDM to be consistent with zero with an order of magnitude improvement in... more
Saehanseul Oh's picture
Saehanseul Oh
John Harris
Postdoctoral Associate

Brookhaven National Lab

Correlations in particle production in proton-lead and lead-lead collisions at the LHC
In high-energy heavy-ion collisions at the Large Hadron Collider (LHC), a hot and dense state of matter called the Quark-Gluon Plasma (QGP) is formed. The initial collision geometry and the subsequent expansion during the QGP stage result in the correlations of produced particles, through which the properties of the QGP can be investigated. Two analyses based on the geometrical correlations of produced particles, one in proton-lead (p–Pb) collisions and the other in lead-lead (Pb–Pb... more
Andrei Petrenko's picture
Andrei Petrenko
Robert Schoelkopf

Enhancing the Lifetime of Quantum Information with Cat States in Superconducting Cavities
The field of quantum computation faces a central challenge that has thus far impeded the full-scale realization of quantum computing machines: decoherence.  Remarkably, however, protocols in Quantum Error Correction (QEC) exist to correct qubit errors and thus extend the lifetime of quantum information.  Reaching the "break-even" point of QEC, at which a qubit's lifetime exceeds the lifetime of the system's constituents, has thus far remained an outstanding goal.... more
Toshihiko Shimasaki's picture
Toshihiko Shimasaki
David DeMille

Continuous Production of 85Rb133Cs Molecules in the Rovibronic Ground State via Short-Range Photoassociation
We present our results on continuous production of ultracold ^{85}Rb^{133}Cs molecules in the rovibronic ground state via short-range photoassociation (PA). Starting with ultracold Rb and Cs atoms trapped in dual-species dark-SPOT MOT, we photoassociate a pair of Rb and Cs atoms into an excited molecular state, which decays into the electronic ground state by spontaneous emission. We apply depletion spectroscopy to the RbCs system and establish a rotationally-resolved, state-selective detection... more
Jukka Vayrynen's picture
Jukka Vayrynen
Leonid Glazman

Electron transport along the edge of a topological insulator
A two-dimensional topological insulator has a gap for bulk excitations, but conducts on its boundaries via gapless edge modes. Time-reversal symmetry prohibits elastic backscattering of electrons propagating within the edge, leading to quantized conductance at zero temperature. Inelastic backscattering, present at finite temperature, breaks the quantization and  increases the edge resistance; the resistance of a long edge acquires a linear dependence on its length. A phenomenological... more