# 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.

Cecile, DJ, and Chandrasekharan, S. "Absence of vortex condensation in a two dimensional fermionic XY model." *Physical Review D Particles, Fields, Gravitation and Cosmology* 77.5 (March 20, 2008).
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Jiang, FJ, Nyfeler, M, Chandrasekharan, S, and Wiese, UJ. "From an antiferromagnet to a valence bond solid: Evidence for a first-order phase transition." *Journal of Statistical Mechanics: Theory and Experiment* 2008.2 (February 1, 2008).
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Jiang, F-J, Nyfeler, M, Chandrasekharan, S, and Wiese, U-J. "From an antiferromagnet to a valence bond solid: evidence for a first-order phase transition." *JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT* (February 2008).
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Cecile, DJ, and Chandrasekharan, S. "Modeling pion physics in the -regime of two-flavor QCD using strong coupling lattice QED." *Physical Review D Particles, Fields, Gravitation and Cosmology* 77.1 (January 17, 2008).
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Chandrasekharan, S. "A new computational approach to lattice quantum field theories." *Proceedings of Science* 66 (January 1, 2008).

Chandrasekharan, S, and Mehta, AC. "Effects of the anomaly on the two-flavor QCD chiral phase transition." *Physical Review Letters* 99.14 (October 5, 2007): 142004-null.
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Podolsky, D, Berkeley, UC, Chandrasekharan, S, Vishwanath, A, Berkeley, UC, and Berkeley, LBL. "Novel transitions in S=1 spinor condensates and XY Ashkin-Teller universality." *arXiv:0707.0695 [cond-mat.stat-mech]* (2007). (Academic Article)

Lee, JW, Chandrasekharan, S, and Baranger, HU. "Disorder-Induced Superfluidity in Hardcore Bosons in Two Dimensions(Submitted)." *Phys. Rev. B* (2007). (Academic Article)

Chandrasekharan, S. "Anomalous superfluidity in (2+1)-dimensional two-color lattice QCD." *Phys Rev Lett* 97.18 (November 3, 2006): 182001-.
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Priyadarshee, A, Chandrasekharan, S, Lee, J-W, and Baranger, HU. "Quantum phase transitions of hard-core bosons in background potentials." *Phys Rev Lett* 97.11 (September 15, 2006): 115703-.
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