# Shailesh Chandrasekharan

## Professor of Physics

### Overview

Prof. Chandrasekharan is interested in understanding quantum field theories non-perturbatively from first principles calculations. His research focuses on lattice formulations with emphasis on strongly correlated fermionic systems of interest in condensed matter, particle and nuclear physics. He develops novel Monte-Carlo algorithms to study these problems. He is particularly excited about solutions to the notoriously difficult sign problem that haunts quantum systems containing fermions and gauge fields. He recently proposed an idea called the fermion bag approach, using which he has been able to solve numerous sign problems that seemed unsolvable earlier. Using various algorithmic advances over the past decade, he is interested in understanding the properties of quantum critical points containing interacting fermions. Some of his recent publications can be found here.

Zou, H, Liu, Y, Lai, CY, Unmuth-Yockey, J, Yang, LP, Bazavov, A, Xie, ZY, Xiang, T, Chandrasekharan, S, Tsai, SW, and Meurice, Y. "Progress towards quantum simulating the classical O(2) model." *Physical Review a Atomic, Molecular, and Optical Physics* 90.6 (December 1, 2014).
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Huffman, EF, and Chandrasekharan, S. "Solution to sign problems in half-filled spin-polarized electronic systems." *Physical Review B Condensed Matter and Materials Physics* 89.11 (March 12, 2014).
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Chandrasekharan, S. "Fermion bags and a new origin for a fermion mass." *Proceedings of Science* Part F130500 (January 1, 2014).
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Chandrasekharan, S, and Li, A. "Quantum critical behavior in three dimensional lattice Gross-Neveu models." *Physical Review D Particles, Fields, Gravitation and Cosmology* 88.2 (July 31, 2013).
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Chandrasekharan, S. "Fermion bag approach to fermion sign problems." *The European Physical Journal A* 49.7 (July 2013).
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Chandrasekharan Shailesh, . "Fermion Bag Solutions to Sign Problems." *Proceedings of Science* Lattice2012 (December 2012): 224-. (Academic Article)

Chandrasekharan, S. "Solutions to sign problems in lattice Yukawa models." *Physical Review D Particles, Fields, Gravitation and Cosmology* 86.2 (July 3, 2012).
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Chandrasekharan, S, and Li, A. "Fermion bag solutions to some sign problems in four-fermion field theories." *Physical Review D Particles, Fields, Gravitation and Cosmology* 85.9 (May 22, 2012).
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Chandrasekharan, S, and Li, A. "Fermion bags, duality, and the three dimensional massless lattice thirring model." *Phys Rev Lett* 108.14 (April 6, 2012): 140404-.
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Chandrasekharan, S, and Li, A. "Fermion bag approach to the sign problem in strongly coupled lattice QED with Wilson fermions." *Journal of High Energy Physics* 2011.1 (September 29, 2011).
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