D
Dae-Il Choi
Researcher at Goddard Space Flight Center
Publications - 16
Citations - 2062
Dae-Il Choi is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Numerical relativity & Gravitational wave. The author has an hindex of 11, co-authored 16 publications receiving 1917 citations. Previous affiliations of Dae-Il Choi include University of Texas at Austin & Korea Institute of Science and Technology Information.
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Gravitational-Wave Extraction from an Inspiraling Configuration of Merging Black Holes
TL;DR: The approach follows the "puncture" treatment of black holes, but utilizing a new gauge condition which allows the black holes to move successfully through the computational domain, and applies these techniques to an inspiraling binary, modeling the radiation generated during the final plunge and ringdown.
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Theory of nonlinear Landau-Zener tunneling
TL;DR: In this paper, a comprehensive analysis of the nonlinear Landau-Zener tunneling is presented, where the authors find characteristic scaling or power laws for the critical behavior that occurs as the non-linear parameter equals to the gap of avoided crossing energy levels.
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How to move a black hole without excision: Gauge conditions for the numerical evolution of a moving puncture
TL;DR: In this article, the authors present analytic considerations which suggest certain gauge choices, and numerically demonstrate their efficacy in evolving a single moving puncture black hole, which is critically undergirded by a careful choice of gauge.
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Binary black hole merger dynamics and waveforms
TL;DR: In this paper, the authors apply recently developed techniques for simulations of moving black holes to study dynamics and radiation generation in the last few orbits and merger of a binary black hole system, and find profound agreement at the level of 1% among the simulations for the last orbit, merger and ringdown, resulting in a final black hole with spin parameter a/m = 0.69.
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Bose-einstein condensates in an optical lattice
Dae-Il Choi,Qian Niu +1 more
TL;DR: In this paper, the authors calculate the quantum motion of a Bose-Einstein condensate in an optical lattice generated by a standing wave of laser light, and show how to boost a stationary condensor into motion or stop a moving condensor.