A
Andrei Alexandru
Researcher at George Washington University
Publications - 163
Citations - 4140
Andrei Alexandru is an academic researcher from George Washington University. The author has contributed to research in topics: Lattice QCD & Quantum chromodynamics. The author has an hindex of 33, co-authored 147 publications receiving 3343 citations. Previous affiliations of Andrei Alexandru include University of Maryland, College Park & University of Bern.
Papers
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Glueball spectrum and matrix elements on anisotropic lattices
Y. Chen,Y. Chen,Andrei Alexandru,Shao-Jing Dong,Terrence Draper,Ivan Horvath,Frank X. Lee,Frank X. Lee,K. F. Liu,Nilmani Mathur,Nilmani Mathur,Colin Morningstar,Mike Peardon,S. Tamhankar,Bing-Lin Young,Jian-Bo Zhang +15 more
TL;DR: In this paper, the glueball-to-vacuum matrix elements of local gluonic operators in scalar, tensor, and pseudoscalar channels are investigated numerically on several anisotropic lattices with the spatial lattice spacing ranging from 0.1-0.2 fm.
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Sign problem and Monte Carlo calculations beyond Lefschetz thimbles
TL;DR: In this article, Monte Carlo simulations of theories with severe sign problems can be profitably performed over manifolds in complex space different from the one with fixed imaginary part of the action (Lefschetz thimble).
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π N and Strangeness Sigma Terms at the Physical Point with Chiral Fermions
TL;DR: In this paper, the scalar matrix element for the light/strange quark was calculated and the ratio of the strange/light matrix elements is $y=0.09(3)(1)
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Monte Carlo algorithm for simulating fermions on Lefschetz thimbles
TL;DR: In this paper, the authors propose a Monte Carlo algorithm to deform the integration region in the complex plane to a Lefschetz thimble, which is then used to sample the dominant thimble.
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Gluon field digitization for quantum computers
Andrei Alexandru,Andrei Alexandru,Paulo F. Bedaque,Siddhartha Harmalkar,Henry Lamm,Scott Lawrence,Neill C. Warrington +6 more
TL;DR: In this paper, the authors proposed a modified Wilson action that allows simulations in the scaling window and carry out classical Monte Carlo calculations down to lattice spacings of order $a √ √ 0.08\text{ } √{ }\mathrm{fm}.