Professor of Physics
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., et al. “Progress towards quantum simulating the classical O(2) model.” Physical Review a Atomic, Molecular, and Optical Physics, vol. 90, no. 6, Dec. 2014. Scopus, doi:10.1103/PhysRevA.90.063603. Full Text
Huffman, E. F., and S. Chandrasekharan. “Solution to sign problems in half-filled spin-polarized electronic systems.” Physical Review B Condensed Matter and Materials Physics, vol. 89, no. 11, Mar. 2014. Scopus, doi:10.1103/PhysRevB.89.111101. Full Text
Chandrasekharan, S., and A. Li. “Quantum critical behavior in three dimensional lattice Gross-Neveu models.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 88, no. 2, July 2013. Scopus, doi:10.1103/PhysRevD.88.021701. Full Text
Chandrasekharan, Shailesh. “Fermion bag approach to fermion sign problems.” The European Physical Journal A, vol. 49, no. 7, Springer Science and Business Media LLC, July 2013. Crossref, doi:10.1140/epja/i2013-13090-y. Full Text
Chandrasekharan, S. “Solutions to sign problems in lattice Yukawa models.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 86, no. 2, July 2012. Scopus, doi:10.1103/PhysRevD.86.021701. Full Text
Chandrasekharan, S., and A. Li. “Fermion bag solutions to some sign problems in four-fermion field theories.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 85, no. 9, May 2012. Scopus, doi:10.1103/PhysRevD.85.091502. Full Text
Chandrasekharan, Shailesh, and Anyi Li. “Fermion bags, duality, and the three dimensional massless lattice thirring model..” Physical Review Letters, vol. 108, no. 14, Apr. 2012. Epmc, doi:10.1103/physrevlett.108.140404. Full Text
Chandrasekharan, S. “Fermion bag solutions to sign problems.” Proceedings of Science, vol. Part F130497, Jan. 2012.
Chandrasekharan, S., and A. Li. “Fermion bag approach to the sign problem in strongly coupled lattice QED with Wilson fermions.” Journal of High Energy Physics, vol. 2011, no. 1, Sept. 2011. Scopus, doi:10.1007/JHEP01(2011)018. Full Text