• Subspace Control of Nitrogen Vacancy centers at Zero Field 

  Ruhlmann, Romain (University of Waterloo, 2020-01-24)

  Nitrogen-Vacancy centers negatively charged (NV-) are spin-1 objects in diamond. In the absence of a magnetic field, two of its levels are degenerate, which is why a field is often used to lift the degeneracy and allow ...

• Numerical Engineering of Adiabatic Quantum Operations 

  Tabatabaei, Seyed Sahand (University of Waterloo, 2020-01-23)

  Adiabatic quantum operations are ubiquitous in fields such as quantum information processing, quantum control, and magnetic resonance, where their high fidelity and general robustness renders them an essential tool for ...

• Ultra Low Dissipation Silicon Nanowire Resonator Arrays for Scanning Probe Applications 

  Jordan, Andrew (University of Waterloo, 2020-01-23)

  This work describes the fabrication and characterization of silicon nanowire oscillators for use in ultra-high sensitivity force detection. These structures are optimized for use as scanning probes by fabricating ...

• Probing Dark Matter from the Galaxy to the Cosmic Web 

  Yang, Tianyi (University of Waterloo, 2020-01-23)

  Dark matter, although invisible, accounts for the majority of matter of the universe. How this invisible component affects cosmic structure formation is one of the primary lines of inquiry in physical cosmology, and the ...

• Exploring new routes to decoherence-free quantum computing; and quantum thermodynamics for fermions 

  Onuma-Kalu, Marvellous (University of Waterloo, 2020-01-23)

  This thesis has two parts; the first part is a contribution to the research field of quantum measurement in quantum optics while the second part focuses on quantum thermodynamics for fermionic systems. The aim of the ...

• Few-Cycle Laser Pulse Generation and Characterization for Coulomb Explosion Imaging of Molecules 

  Singh, Michael (University of Waterloo, 2020-01-22)

  Ultrashort pulses can induce coulomb explosions of molecules through which ionic fragments receive substantial momentum. These momenta, measured in coincidence, carry information about the molecule's initial geometry. ...

• Investigation of Photon Interactions with Semiconductor Quantum Dot Devices for Quantum Communication Applications 

  Phoenix, Jason (University of Waterloo, 2020-01-21)

  A major goal in the field of quantum communication is to achieve long-distance (>100 km) transmission of quantum information, which would allow for the formation of a global quantum network. Devices called 'quantum repeaters' ...

• Bichromatic dressing of Rydberg atoms and on the correctness of many-mode Floquet theory 

  Poertner, Adam (University of Waterloo, 2020-01-20)

  Many-mode Floquet theory [T.-S. Ho, S.-I. Chu, and J. V. Tietz, Chem. Phys. Lett. 96, 464 (1983)] was designed as an extension of Floquet theory suitable for solving the time-dependent Schrodinger equation with multiple ...

• Towards On-demand Generation of Entangled Photons with Quantum Dots 

  Ahmadi, Arash (University of Waterloo, 2020-01-17)

  The biexciton-exciton cascade in quantum dots (QDs) yields entangled photon pairs, and recent developments in engineering photonic structures around the dot for efficient light extraction and proper control of the ...

• Efficient polyyne formation by ns and fs laser-induced breakdown in ethylene and acetylene gas flow 

  Takizawa, N.; Kodama, T.; Shiromaru, H.; Wakabayashi, T.; Al-Tuairqi, S.; Wang, Qi; Zhang, H.; Sanderson, J. H. (Elsevier, 2019-11)

  We studied polyyne formation by gas phase laser-induced breakdown in ethylene and acetylene gas flow using ns and fs lasers. The results show that acetylene is the most efficient target molecule for generating polyynes ...

• Causal Discovery of Photonic Bell Experiments 

  Daley, Patrick (University of Waterloo, 2020-01-13)

  A causal understanding of a physical theory is vital. They provide profound insights into the implications of the theory and contain the information required to manipulate, not only predict, our surroundings. Unfortunately, ...

• Hillock-free and atomically smooth InSb QWs grown on GaAs substrates by MBE 

  Shi, Y.; Bergeron, E.; Sfigakis, F.; Baugh, J.; Wasilewski, Z. (Elsevier, 2019-05-01)

  Comprehensive studies on the surface morphological evolution of AlInSb metamorphic buffers and InSb QWs grown on top were conducted as a function of the GaAs (0 0 1) substrate offcut angles. We confirmed our earlier ...

• At the Corner of Space and Time 

  Shoshany, Barak (University of Waterloo, 2019-12-09)

  We perform a rigorous piecewise-flat discretization of classical general relativity in the first-order formulation, in both 2+1 and 3+1 dimensions, carefully keeping track of curvature and torsion via holonomies. We show ...

• Computationally Efficient Field-Theoretic Simulations for Block Copolymer Melts 

  Beardsley, T.M.; Spencer, R.K.W.; Matsen, M.W. (American Chemical Society, 2019-11-12)

  Field-theoretic simulations (FTS) provide fluctuation corrections to self-consistent field theory (SCFT) by simulating its field-theoretic Hamiltonian rather than applying the saddle-point approximation. Although FTS work ...

• Segregation of chain ends to the surface of a polymer melt: effect of surface profile versus chain discreteness 

  Mahmoudi, Pendar; Matsen, Mark (Springer, 2016)

  Silberberg has argued that the surface of a polymer melt behaves like a reflecting boundary on the random-walk statistics of the polymers. Although this is approximately true, independent studies have shown that violations ...

• Entropic segregation of short polymers to the surface of a polydisperse melt 

  Mahmoudi, Pendar; Matsen, Mark (Springer, 2017)

  Chain ends are known to have an entropic preference for the surface of a polymer melt, which in turn is expected to cause the short chains of a polydisperse melt to segregate to the surface. Here, we examine this entropic ...

• Field-Sweep Control in Magnetic Resonance and k-space Analysis 

  Amoros Binefa, Julia (University of Waterloo, 2019-10-30)

  In a general magnetic resonance experiment, resonant radiofrequency or microwave fields are applied to an ensemble of electron or nuclear spins to determine their magnetic interactions with their local environment. These ...

• Testing the Universality of Entropic Segregation at Polymer Surfaces 

  Mahmoudi, Pendar; Forrest, William; Beardsley, Tom; Matsen, Mark (2018)

  This study addresses entropic segregation effects at the surfaces of monodisperse and bidisperse melts. For the monodisperse melts, we focus on the segregation of chain ends to the surface, and for the bidisperse melts, ...

• Spontaneous Tilting Transition in Liquid-Crystalline Polymer Brushes 

  Blaber, Steven; Abukhdeir, Nasser Mohieddin; Matsen, Mark (2019)

  The equilibrium phase behavior of main-chain liquid-crystalline polymer brushes in good solvent is investigated using self-consistent field theory. The calculation assumes semi-dilute brushes, where the grafting density ...

• Path Integrals in the Sky: Classical and Quantum Problems with Minimal Assumptions 

  Feldbrugge, Job Leon (University of Waterloo, 2019-10-24)

  Cosmology has, after the formulation of general relativity, been transformed from a branch of philosophy into an active field in physics. Notwithstanding the significant improvements in our understanding of our Universe, ...

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