• Polarimetric and birefringence analysis of presumed amyloid-beta deposits in the retina in association with Alzheimer's disease 

  Jin, Tao (University of Waterloo, 2018-09-26)

  Alzheimer's disease is a neurodegenerative disease which leads to symptoms such as loss of memory and other neurological dysfunctions, ultimately leading to death. Two key hallmarks of Alzheimer's disease are abnormally ...

• An ALMA View of Molecular Gas in Brightest Cluster Galaxies 

  Vantyghem, Adrian (University of Waterloo, 2018-09-25)

  In this thesis I use ALMA observations to map the distribution and kinematics of molecular gas in the brightest cluster galaxies of three galaxy clusters: 2A0335+096, RXJ0821+0752, and RXCJ1504-0248. The goal is to understand ...

• Silicon avalanche photodiodes for satellite based quantum communication 

  DSouza, Ian (University of Waterloo, 2018-09-25)

  Single photons detectors are required for applications like quantum key distribution and testing Bell's inequalities. Silicon avalanche photodiodes (Si APD's) have advantages like low dark count rate. This thesis aims to ...

• Galactic Molecular Dust Clumps using SCUBA-2 - Effects of HII Regions on Star Formation 

  Bobotsis, George (University of Waterloo, 2018-09-21)

  I present findings from a broad array of SCUBA-2 observations. The sample consists of 38 SCUBA-2 images targeted near mature, galactic, HII regions of the Sharpless "Sh-2" or Blitz-Stark-Fich "BFS" catalogue. In 31 of those ...

• H₂¹⁸O and H₂¹⁶O in Intermediate Mass Star Formation Regions 

  Conrad, Mollie (University of Waterloo, 2018-09-20)

  While the process of low mass (LM) star formation is a well studied area of astrophysics, the formation of high mass (HM) stars is much more complicated. The study of intermediate mass (IM) star formation is expected to ...

• Precision Low Temperature Calorimetry and Susceptibility of Magnetic Pyrochlores 

  Pomaranski, David (University of Waterloo, 2018-09-19)

  Spin-ice models feature the same statistical disorder as water ice, which is identified as the source of zero-point entropy. Gapped topological excitations with properties of monopoles are associated with the violation of ...

• Probing the dark universe with gravitational lensing 

  Karami, Mansour (University of Waterloo, 2018-09-17)

  Since its early success as an experimental test of the theory of general relativity in 1919, gravitational lensing has come a long way and is firmly established as an indispensable element for many astrophysical applications. ...

• Spin-orbit states of neutron wave packets 

  Nsofini, Joachim; Sarenac, Dusan; Wood, Christopher J.; Cory, David G.; Arif, Muhammad; Clark, Charles W.; Huber, Michael G.; Pushin, Dimitry A. (American Physical Society, 2016-07-13)

  We propose amethod to prepare an entangled spin-orbit state between the spin and the orbital angular momenta of a neutron wave packet. This spin-orbit state is created by passing neutrons through the center of a quadrupole ...

• Holography with a neutron interferometer 

  Sarenac, Dusan; Huber, Michael G.; Heacock, Benjamin; Arif, Muhammad; Clark, Charles W.; Cory, David G.; Shahi, Chandra B.; Pushin, Dimitry A. (The Optical Society, 2016-10-03)

  We use a Mach-Zehnder interferometer to perform neutron holography of a spiral phase plate. The object beam passes through a spiral phase plate, acquiring the phase twist characteristic of orbital angular momentum states. ...

• Decoupling of a neutron interferometer from temperature gradients 

  Saggu, Parminder; Mineeva, Taisiya; Arif, Muhammad; Cory, David G.; Haun, Robert; Heacock, Benjamin; Huber, Michael G.; Li, Ke; Nsofini, Joachim; Sarenac, Dusan; Shahi, Chandra B.; Skavysh, Vladimir; Snow, W. Michael; Werner, Samuel A.; Young, Albert R.; Pushin, Dimitry A. (AIP Publishing, 2016-12-16)

  Neutron interferometry enables precision measurements that are typically operated within elaborate, multi-layered facilities which provide substantial shielding from environmental noise. These facilities are necessary to ...

• Neutron interferometer crystallographic imperfections and gravitationally induced quantum interference measurements 

  Heacock, Benjamin; Arif, Muhammad; Haun, Robert; Huber, Michael G.; Pushin, Dimitry A.; Young, Albert R. (American Physical Society, 2017-01-25)

  Dynamical diffraction leads to an interesting, unavoidable set of interference effects for neutron interferometers. This experiment studies the interference signal from two and three successive Bragg diffractions in the ...

• Quantum-information approach to dynamical diffraction theory 

  Nsofini, Joachim; Ghofrani, Kamyar; Sarenac, Dusan; Cory, David G.; Pushin, Dimitry A. (American Physical Society, 2016-12-08)

  We present a simplified model for dynamical diffraction of particles through a periodic thick perfect crystal based on repeated application of a coherent beam-splitting unitary at coarse-grained lattice sites. By demanding ...

• Noise refocusing in a five-blade neutron interferometer 

  Nsofini, Joachim; Sarenac, Dusan; Ghofrani, Kamyar; Huber, Michael G.; Arif, Muhammad; Cory, David G.; Pushin, Dimitry A. (AIP Publishing, 2017-08-07)

  We provide a quantum information description of a proposed five-blade neutron interferometer geometry and show that it is robust against low-frequency mechanical vibrations and dephasing due to the dynamical phase. The ...

• Far-field interference of a neutron white beam and the applications to noninvasive phase-contrast imaging 

  Pushin, Dimitry A.; Sarenac, Dusan; Hussey, Daniel S.; Miao, Haixing; Arif, Muhammad; Cory, David G.; Huber, Michael G.; Jacobson, David L.; LaManna, Jacob M.; Parker, Joseph D.; Shinohara, Takenao; Ueno, Wataru; Wen, Han (American Physical Society, 2017-04-26)

  The phenomenon of interference plays a crucial role in the field of precision measurement science. Waveparticle duality has expanded the well-known interference effects of electromagnetic waves to massive particles. The ...

• Increased interference fringe visibility from the post-fabrication heat treatment of a perfect crystal silicon neutron interferometer 

  Heacock, Benjamin; Arif, Muhammad; Cory, David G.; Gnaeupel-Herold, Thomas; Haun, Robert; Huber, Michael G.; Jamer, Michelle E.; Nsofini, Joachim; Pushin, Dimitry A.; Sarenac, Dusan; Taminiau, Ivan; Young, Albert R. (AIP Publishing, 2018-02-08)

  We find that annealing a previously chemically etched interferometer at 800 degrees C dramatically increased the interference fringe visibility from 23% to 90%. The Bragg plane misalignments were also measured before and ...

• Experimental search for long-range forces in neutron scattering via a gravitational spectrometer 

  Serebrov, Anatoli P.; Geltenbort, Peter; Zherebtsov, O. M.; Sbitnev, S. V.; Varlamov, V. E.; Vassiljev, A. V.; Lasakov, M. S.; Krasnoschekova, I. A.; Ivanov, S. N.; Pushin, Dimitry A. (American Physical Society, 2014-04-09)

  In this work we introduce a method of measuring low-energy scattering cross section with a gravitational spectrometer. In this method we add atoms (i.e., He) to the gravitational spectrometer filled with a target gas of ...

• Neutron interferometric measurement of the scattering length difference between the triplet and singlet states of n-He-3 

  Huber, Michael G.; Arif, Muhammad; Chen, Wangchun C.; Gentile, Thomas R.; Hussey, Daniel S.; Black, Timothy C.; Pushin, Dimitry A.; Shahi, Chandra B.; Wietfeldt, Fred E.; Yang, Liang (American Physical Society, 2014-12-15)

  We report a determination of the n-He-3 scattering length difference = b = = b = 1 -b = 0 = [-5.411 = 0.031 (statistical) = 0.039 (systematic)] fm between the triplet and singlet states using a neutron interferometer. This ...

• Quantum correlations in a noisy neutron interferometer 

  Wood, Christopher J.; Abutaleb, Mohamed O.; Huber, Michael G.; Arif, Muhammad; Cory, David G.; Pushin, Dimitry A. (American Physical Society, 2014-09-15)

  We investigate quantum coherences in the presence of noise by entangling the spin and path degrees of freedom of the output neutron beam from a noisy three-blade perfect crystal neutron interferometer. We find that in the ...

• Neutron Interferometry at the National Institute of Standards and Technology 

  Pushin, Dimitry A.; Huber, Michael G.; Arif, Muhammad; Shahi, Chandra B.; Nsofini, Joachim; Wood, Christopher J.; Sarenac, Dusan; Cory, David G. (Hindawi, 2015)

  Neutron interferometry has proved to be a very precise technique for measuring the quantum mechanical phase of a neutron caused by a potential energy difference between two spatially separated neutron paths inside ...

• Neutron limit on the strongly-coupled chameleon field 

  Li, Ke; Arif, Muhammad; Cory, David G.; Haun, Robert; Heacock, Benjamin; Huber, Michael G.; Nsofini, Joachim; Pushin, Dimitry A.; Saggu, Parminder; Sarenac, Dusan; Shahi, Chandra B.; Skavysh, Vladimir; Snow, W. Michael; Young, Albert R. (American Physical Society, 2016-03-11)

  The physical origin of the dark energy that causes the accelerated expansion rate of the Universe is one of the major open questions of cosmology. One set of theories postulates the existence of a self-interacting scalar ...

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