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.
Chandrasekharan, S, and Jiang, FJ. "Phase diagram of two-color lattice QCD in the chiral limit." Physical Review D Particles, Fields, Gravitation and Cosmology 74.1 (July 14, 2006). Full Text
Chandrasekharan, S, and Mehta, AC. "Effects of the anomaly on the QCD chiral phase transition." Proceedings of Science 32 (January 1, 2006).
Chandrasekharan, S. "New approaches to strong coupling lattice QCD." Int. J. Mod. Phys. B20 (2006): 2714-2723. (Academic Article)
Yoo, J, Chandrasekharan, S, Kaul, RK, Ullmo, D, and Baranger, HU. "On the sign problem in the Hirsch-Fye algorithm for impurity problems." Journal of Physics A: Mathematical and General 38.48 (December 2, 2005): 10307-10310. Full Text
Lee, JW, Chandrasekharan, S, and Baranger, HU. "Quantum Monte Carlo study of disordered fermions." Physical Review B Condensed Matter and Materials Physics 72.2 (July 1, 2005). Full Text
Yoo, J, Chandrasekharan, S, and Baranger, HU. "Multilevel algorithm for quantum-impurity models." Phys Rev E Stat Nonlin Soft Matter Phys 71.3 Pt 2B (March 2005): 036708-. Full Text
Yoo, J, Chandrasekharan, S, Kaul, RK, Ullmo, D, and Baranger, HU. "Cluster algorithms for quantum impurity models and mesoscopic Kondo physics." Physical Review B Condensed Matter and Materials Physics 71.20 (January 1, 2005). Full Text