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Uniqueness of some cylindrical tangent cones to special Lagrangians
Published 2023“…Abstract We show that if an exact special Lagrangian $$N\subset {\mathbb {C}}^n$$ N ⊂ C n has a multiplicity one, cylindrical tangent cone of the form $${\mathbb {R}}^{k}\times {\textbf{C}}$$ R k × C where $${\textbf{C}}$$ C is a special Lagrangian cone with smooth, connected link, then this tangent cone is unique provided $${\textbf{C}}$$ C satisfies an integrability condition. …”
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An index theorem for end-periodic operators
Published 2016“…We extend the Atiyah, Patodi, and Singer index theorem for first-order differential operators from the context of manifolds with cylindrical ends to manifolds with periodic ends. This theorem provides a natural complement to Taubes’ Fredholm theory for general end-periodic operators. …”
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Inverse Designed Metalenses with Extended Depth of Focus
Published 2020“…Keywords: diffractive optics; dielectric metasurface; extended depth of focus lens; inverse design; cylindrical lens…”
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Degree reduction and graininess for Kakeya-type sets in R[superscript 3]
Published 2018“…Let T be a set of cylindrical tubes in ℝ[superscrpit 3] of length N and radius 1. …”
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Regularity of the Level Set Flow
Published 2018“…We show here that the second derivative is continuous if and only if the flow has a single singular time where it becomes extinct and the singular set consists of a closed C[superscript 1] manifold with cylindrical singularities. © 2017 Wiley Periodicals, Inc.…”
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Complexity of parabolic systems
Published 2021“…Namely, we prove that in any dimension and codimension any ancient flow that is cylindrical at − ∞ $-\infty $ must be a flow of hypersurfaces in a Euclidean subspace. …”
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Generic mean curvature flow I; generic singularities
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Computational inverse design of non-intuitive illumination patterns to maximize optical force or torque
Published 2017“…The nonconvex optimization is efficiently performed by combining a compact cylindrical Bessel basis representation with a fast boundary element method and a standard derivative-free, local optimization algorithm. …”
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Maximizing Performance of Quantum Cascade Laser-Pumped Molecular Lasers
Published 2021“…Using a validated three-level model that captures the essential collision and saturation behaviors of the QPML gas nitrous oxide (N₂O), we explore how the threshold pump power and output terahertz power depend on the pump power and gas pressure, as well as on the diameter, length, and output-coupler transmissivity of a cylindrical cavity. The analysis indicates that maximum power occurs as pump saturation is minimized in a manner that depends much more sensitively on pressure than on cell diameter, length, or transmissivity. …”
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Lozenge Tilings and the Gaussian Free Field on a Cylinder
Published 2022“…Under the first variant, corresponding to random cylindric partitions, the height function converges to a deterministic limit shape and fluctuations around it are given by the Gaussian free field in the conformal structure predicted by the Kenyon-Okounkov conjecture. …”
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