David G. Cory

University of Waterloo

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Co-Authors

D. A. Pushin

University of Waterloo

D. Sarenac

University of Waterloo

Timothy F. Havel

Massachusetts Institute of Technology

M. G. Huber

Brooklyn Hospital Center

Chandrasekhar Ramanathan

Dartmouth College

Ronald L. Walsworth

University of Maryland, College Park

R. W. Mair

Athinoula A. Martinos Center for Biomedical Imaging

Connor Kapahi

University of Waterloo

Marco A. Pravia

BAE Systems (United States)

Evan M. Fortunato

Apogee Technology (United States)

Cooperative Institutions

Steklov Mathematical Institute

288

Massachusetts Institute of Technology

131

University of Waterloo

107

Harvard University

National Institute of Standards and Technology

Centre National de la Recherche Scientifique

IIT@MIT

Harvard University Press

Cornell University

Los Alamos National Laboratory

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Gradient-Diffusion Methods for Simulating Decoherence by NMR Spectroscopy

arXiv (Cornell University) (2000)

Timothy F. Havel Yehuda Sharf Lorenza Viola David G. Cory

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Universal Control of Nuclear Spins via Anisotropic Hyperfine Interactions

Bulletin of the American Physical Society (2007)

J. S. Hodges Jamie C. Yang Chandrasekhar Ramanathan David G. Cory

We propose a method for completely controlling a nuclear spin subsystem using only microwave irradiation of resolved anisotropic hyperfine interactions with a single electron spin. This paradigm of control has important applications for spin based solid-state quantum information processing. In particular we argue that indirect addressing of the nuclear spins via an electron spin acting as a spin actuator allows for nuclear spin quantum logic gates whose operational times are significantly faster than either gates based on rf fields resonant with nuclear spin flips or nuclear-nuclear dipolar interactions. We demonstrate experimental aspects of this method with one electron and one nuclear spin of a single crystal of irradiated malonic acid.

Pulsed EPR

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Hadamard products of product operators and the design of gradient-diffusion experiments for simulating decoherence by NMR spectroscopy

Physics Letters A (2001)

Timothy F. Havel Yehuda Sharf Lorenza Viola David G. Cory

Formalism (music)

10.1016/s0375-9601(01)00083-4

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Citations (31)

Phonon engineering in proximity enhanced superconductor heterostructures

Scientific Reports (2017)

Yongchao Tang Sangil Kwon Hamid Reza Mohebbi David G. Cory Guo‐Xing Miao

In this research, we tailor the phonon density of states (DOS) in thin superconducting films to suppress quasiparticle losses. We examine a model system of a proximity-enhanced three-layered Al/Nb/Al heterostructure and show that the local quantized phonon spectrum of the ultrathin Al cladding layers in the heterostructure has a pronounced effect on the superconducting resonator's quality factors. Instead of a monotonic increase of quality factors with decreasing temperatures, we observe the quality factor reaches a maximum at 1.2 K in 5/50/5 nm Al/Nb/Al microstrip resonators, because of a quantized phonon ladder. The phonon DOS may be engineered to enhance the performance of quantum devices.

10.1038/s41598-017-04057-1

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Remote state preparation of single photon orbital angular momentum lattices

arXiv (Cornell University) (2021)

Andrew Cameron Sandra W. L. Cheng Sacha Schwarz Connor Kapahi D. Sarenac

Optical beams with periodic lattice structures have broadened the study of structured waves. In the present work, we generate spin-orbit entangled photon states with a lattice structure and use them in a remote state preparation protocol. We sequentially measure spatially-dependent correlation rates with an electron-multiplying intensified CCD camera and verify the successful remote preparation of spin-orbit states by performing pixel-wise quantum state tomography. Control of these novel structured waves in the quantum regime provides a method for quantum sensing and manipulation of periodic structures.

Lattice (music)

Optical lattice

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Pseudo-Random Unitary Operators for Quantum Information Processing

Science (2003)

Joseph Emerson Yaakov S. Weinstein Marcos Saraceno Seth Lloyd David G. Cory

In close analogy to the fundamental role of random numbers in classical information theory, random operators are a basic component of quantum information theory. Unfortunately, the implementation of random unitary operators on a quantum processor is exponentially hard. Here we introduce a method for generating pseudo-random unitary operators that can reproduce those statistical properties of random unitary operators most relevant to quantum information tasks. This method requires exponentially fewer resources, and hence enables the practical application of random unitary operators in quantum communication and information processing protocols. Using a nuclear magnetic resonance quantum processor, we were able to realize pseudorandom unitary operators that reproduce the expected random distribution of matrix elements.

Quantum Fourier transform

Circular ensemble

10.1126/science.1090790

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Citations (213)

Materials Imaging with Examples from Solid Rocket Propellants

Werner Maas L. H. Merwin David G. Cory

This chapter contains sections titled: Introduction to Materials Imaging Case Study: NMR Imaging of Rocket Motor Propellants

Solid-fuel rocket

Rocket (weapon)

Rocket propellant

10.1002/9783527611843.ch12

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Citations (3)

I. Additive relations in alkylhalosilanes

Journal of Organometallic Chemistry (1982)

David G. Cory Amy C. Lee Wong W. M. Ritchey

10.1016/s0022-328x(00)96081-9

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Citations (7)

Spin amplifier for single spin measurement

Springer eBooks (2006)

Paola Cappellaro Joseph Emerson Nicolas Boulant Chandrasekhar Ramanathan Seth Lloyd

Hamiltonian (control theory)

Quantum Metrology

Spin states

10.1007/0-387-31143-2_37

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Quantum simulation of a three-body-interaction Hamiltonian on an NMR quantum computer

Physical Review A (1999)

Ching-Hsiang Tseng Shyamal Somaroo Yehuda Sharf Emanuel Knill Raymond Laflamme

Extensions of average Hamiltonian theory to quantum computation permit the design of arbitrary Hamiltonians, allowing rotations throughout a large Hilbert space. In this way, the kinematics and dynamics of any quantum system may be simulated by a quantum computer. A basis mapping between the systems dictates the average Hamiltonian in the quantum computer needed to implement the desired Hamiltonian in the simulated system. The flexibility of the procedure is illustrated with NMR on ${}^{13}\mathrm{C}$ labeled alanine by creating the nonphysical Hamiltonian ${\ensuremath{\sigma}}_{z}{\ensuremath{\sigma}}_{z}{\ensuremath{\sigma}}_{z}$ corresponding to a three-body interaction.

Hamiltonian (control theory)

Quantum system

10.1103/physreva.61.012302

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Citations (123)