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., et al. “Rotor spectra, berry phases, and monopole fields: From antiferromagnets to QCD.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 78, no. 7, Oct. 2008. Scopus, doi:10.1103/PhysRevD.78.077901. Full Text
Cecile, D. J., and S. Chandrasekharan. “Role of the σ resonance in determining the convergence of chiral perturbation theory.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 77, no. 9, May 2008. Scopus, doi:10.1103/PhysRevD.77.091501. Full Text
Cecile, D. J., and S. Chandrasekharan. “Absence of vortex condensation in a two dimensional fermionic XY model.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 77, no. 5, Mar. 2008. Scopus, doi:10.1103/PhysRevD.77.054502. Full Text
Jiang, F. J., et al. “From an antiferromagnet to a valence bond solid: Evidence for a first-order phase transition.” Journal of Statistical Mechanics: Theory and Experiment, vol. 2008, no. 2, Feb. 2008. Scopus, doi:10.1088/1742-5468/2008/02/P02009. Full Text
Cecile, D. J., and S. Chandrasekharan. “Modeling pion physics in the -regime of two-flavor QCD using strong coupling lattice QED.” Physical Review D Particles, Fields, Gravitation and Cosmology, vol. 77, no. 1, Jan. 2008. Scopus, doi:10.1103/PhysRevD.77.014506. Full Text
Cecile, D. J., and Shailesh Chandrasekharan. “Sigma-resonance and convergence of chiral perturbation theory.” Pos, vol. LATTICE2008, 2008.
Chandrasekharan, S. “A new computational approach to lattice quantum field theories.” Proceedings of Science, vol. 66, Jan. 2008.
Chandrasekharan, Shailesh, and Abhijit C. Mehta. “Effects of the anomaly on the two-flavor QCD chiral phase transition..” Physical Review Letters, vol. 99, no. 14, Oct. 2007. Epmc, doi:10.1103/physrevlett.99.142004. Full Text
Podolsky, D., et al. “Novel transitions in S=1 spinor condensates and XY Ashkin-Teller universality.” Arxiv:0707.0695 [Cond Mat.Stat Mech], 2007.
Lee, J. W., et al. “Disorder-Induced Superfluidity in Hardcore Bosons in Two Dimensions.” Phys. Rev. B, 2007.