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.
Lee, J. W., et al. “Quantum Monte Carlo study of disordered fermions.” Physical Review B Condensed Matter and Materials Physics, vol. 72, no. 2, July 2005. Scopus, doi:10.1103/PhysRevB.72.024525. Full Text
Yoo, Jaebeom, et al. “Multilevel algorithm for quantum-impurity models.” Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, vol. 71, no. 3 Pt 2B, Mar. 2005, p. 036708. Epmc, doi:10.1103/physreve.71.036708. Full Text
Chandrasekharan, Shailesh, and Costas G. Strouthos. “Failure of mean field theory at large N.” Physical Review Letters, vol. 94, no. 6, Feb. 2005, p. 061601. Epmc, doi:10.1103/physrevlett.94.061601. Full Text
Yoo, J., et al. “Cluster algorithms for quantum impurity models and mesoscopic Kondo physics.” Physical Review B Condensed Matter and Materials Physics, vol. 71, no. 20, Jan. 2005. Scopus, doi:10.1103/PhysRevB.71.201309. Full Text
Chandrasekharan, S., and F. J. Jiang. “Chiral limit of 2-color QCD at strong couplings.” Proceedings of Science, vol. 20, Jan. 2005.
Chandrasekharan, S., and U. J. Wiese. “An introduction to chiral symmetry on the lattice.” Progress in Particle and Nuclear Physics, vol. 53, no. 2, Oct. 2004, pp. 373–418. Scopus, doi:10.1016/j.ppnp.2004.05.003. Full Text
Brower, R., et al. “D-theory: Field quantization by dimensional reduction of discrete variables.” Nuclear Physics B, vol. 693, no. 1–3, Aug. 2004, pp. 149–75. Scopus, doi:10.1016/j.nuclphysb.2004.06.007. Full Text
Chandrasekharan, S., et al. “Lattice theories with nonlinearly realized chiral symmetry.” Nuclear Physics B Proceedings Supplements, vol. 129–130, Jan. 2004, pp. 507–09. Scopus, doi:10.1016/S0920-5632(03)02624-0. Full Text
Chandrasekharan, S., and C. G. Strouthos. “Connecting lattice QCD with chiral perturbation theory at strong coupling.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 69, no. 9, Jan. 2004, p. 5. Scopus, doi:10.1103/PhysRevD.69.091502. Full Text