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.
Bhattacharya, T., et al. “Non-perturbative renormalization constants using Ward identities 1.” Physics Letters, Section B: Nuclear, Elementary Particle and High Energy Physics, vol. 461, no. 1–2, Jan. 1999, pp. 79–88. Scopus, doi:10.1016/S0370-2693(99)00796-0. Full Text
Chandrasekharan, S. “Confinement, chiral symmetry breaking and continuum limits in quantum link models.” Nuclear Physics B Proceedings Supplements, vol. 73, no. 1–3, Jan. 1999, pp. 739–41. Scopus, doi:10.1016/S0920-5632(99)85189-5. Full Text
Chandrasekharan, S. “Lattice QCD with Ginsparg-Wilson fermions.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 60, no. 7, 1999, pp. 1–6.
Chandrasekharan, S. “Ginsparg-Wilson fermions: A study in the Schwinger model.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 59, no. 9, 1999, pp. 1–8.
Brower, R., et al. “QCD as a quantum link model.” Physical Review D, vol. 60, no. 9, 1999.
Brower, R., et al. “Green's functions from quantum cluster algorithms.” Physica A: Statistical Mechanics and Its Applications, vol. 261, no. 3–4, Dec. 1998, pp. 520–33. Scopus, doi:10.1016/S0378-4371(98)00325-2. Full Text
Beard, B. B., et al. “D-theory: Field theory via dimensional reduction of discrete variables.” Nuclear Physics B Proceedings Supplements, vol. 63, no. 1–3, Jan. 1998, pp. 775–89. Scopus, doi:10.1016/S0920-5632(97)00900-6. Full Text
Brower, R., et al. Green’s functions from quantum cluster algorithms11This work is supported in part by funds provided by the US Department of Energy (DOE) under cooperative research agreement DE-FC02-94ER40818. Vol. 261, no. 3, 1998, pp. 520–33.