9/24 - Started new research position at Meta
2/24 - Completed 2nd research internship at Meta
11/23 - Poster at Reality Labs Research at Meta
8/23 - Talk at Reality Labs Research at Meta
2/23 - Talk at UCSD Geometric Mechanics Group
12/22 - Advanced to Ph.D. candidacy
3/22 - Completed research internship at Meta
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9/24 - Started new research position at Meta
2/24 - Completed 2nd PhD internship at Meta
11/23 - Poster at Reality Labs at Meta
8/23 - Talk at Reality Labs at Meta
2/23 - Talk at UCSD Geometric Mech. Group
12/22 - Advanced to PhD candidacy
3/22 - Completed PhD internship at Meta
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Spring 2024 - CSE 291: Physics Simulation
Spring 2022 - MUS 172: Computer Music II
Winter 2022 - MUS 171: Computer Music I
Spring 2021 - MUS 172: Computer Music II
Winter 2021 - MUS 15: Popular Music
Fall 2020 - MUS 6: Electronic Music
Spring 2020 - MUS 5: Sound in Time (TA)
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Spring 2024 - CSE 291: Physics Simulation
Spring 2022 - MUS 172: Computer Music II
Winter 2022 - MUS 171: Computer Music I
Spring 2021 - MUS 172: Computer Music II
Winter 2021 - MUS 15: Popular Music
Fall 2020 - MUS 6: Electronic Music
Spring 2020 - MUS 5: Sound in Time (TA)
View all courses
Recent Publications
Recent Publications
Wave simulations in infinite spacetime
Chad McKell, Mohammad Sina Nabizadeh, Stephanie Wang, Albert Chern
Solving the wave equation on an infinite domain has been an ongoing challenge
in scientific computing. Conventional approaches to this problem only generate numerical solutions on a
small subset of the infinite domain. In this paper, we present a method for solving the wave equation on
the entire infinite domain using only finite computation time and memory. Our method is based on the
conformal invariance of the scalar wave equation under the Kelvin transformation in Minkowski spacetime. As
a result of the conformal invariance, any wave problem with compact initial data contained in a causality
cone is equivalent to a wave problem on a bounded set in Minkowski spacetime. We use this fact to perform
wave simulations in infinite spacetime using a finite discretization of the bounded spacetime with no
additional loss of accuracy introduced by the Kelvin transformation.
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Optical corral using a standing-wave Bessel beam
Chad McKell, Keith Bonin
Here we create a series of optical corrals and calculate their potential energy profile.
A standing-wave Bessel beam is used to form traps in 1D (along the optical axis) and corrals in 2D, in planes
perpendicular to the optical axis at the antinodal regions of the standing waves. These optical corrals are formed
by an axicon-generated Bessel beam that is retro-reflected back onto itself. We report on Mie calculations of the
2D optical corrals and then compare the resulting probability distributions to those observed for latex particles
of diameters 100, 200, and 300 nm. The experimental radial probability density function of tracked particles closely
mimics the theoretical optical structure of a Bessel standing-wave corral. The Bessel standing-wave corrals we have
characterized are being developed to measure rotational diffusion and torques on micro- and nanorods to help
understand microfluidic behavior. The maximum forces on our small beads in the diffraction-free central zone of the
Bessel beam standing wave are ๐น||=0.5โโpN and ๐นโฅ=0.1โโpN.
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