Professor of Physics
Prof. Chandrasekharan is interested in understanding quantum field theories non-perturbatively from first principles calculations. His research focuses on lattice formulations of these theories 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 has 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. Recently he is exploring how one can use quantum computers to solve quantum field theories.
Chandrasekharan, S. “Fermions with a domain-wall mass: explicit greens function and anomaly cancellation.” Nuclear Physics B (Proceedings Supplements), vol. 34, no. C, Jan. 1994, pp. 579–82. Scopus, doi:10.1016/0920-5632(94)90451-0. Full Text
Huffman, Emilie, and Shailesh Chandrasekharan. “Solution to new sign problems with Hamiltonian Lattice Fermions.” Pos (Lattice 2014) 058. Open Access Copy
Ayyar, Venkitesh, et al. “Benchmark results in the 2D lattice Thirring model with a chemical potential.” Physical Review D, vol. 97, no. 5, American Physical Society (APS). Crossref, doi:10.1103/physrevd.97.054501. Full Text
Chandrasekharan, Shailesh. Novel Quantum Monte Carlo Algorithms for Fermions.
Chandrasekharan, Shailesh, and Uwe-Jens Wiese. SO(10) Unification of Color Superconductivity and Chiral Symmetry Breaking?
Chandrasekharan, Shailesh, and Uwe-Jens Wiese. Partition Functions of Strongly Correlated Electron Systems as "Fermionants".
Chandrasekharan, S., et al. Meron-Cluster Simulation of Quantum Spin Ladders in a Magnetic Field.