# Shailesh Chandrasekharan

## Professor of Physics

### Overview

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, Shailesh. “Anomalous superfluidity in (2+1)-dimensional two-color lattice QCD..” *Physical Review Letters*, vol. 97, no. 18, Nov. 2006. *Epmc*, doi:10.1103/physrevlett.97.182001.
Full Text

Priyadarshee, Anand, et al. “Quantum phase transitions of hard-core bosons in background potentials..” *Physical Review Letters*, vol. 97, no. 11, Sept. 2006. *Epmc*, doi:10.1103/physrevlett.97.115703.
Full Text

Chandrasekharan, S., and F. J. Jiang. “Phase diagram of two-color lattice QCD in the chiral limit.” *Physical Review D Particles, Fields, Gravitation and Cosmology*, vol. 74, no. 1, July 2006. *Scopus*, doi:10.1103/PhysRevD.74.014506.
Full Text

Kaul, Ribhu K., et al. “Spectroscopy of the Kondo problem in a box..” *Physical Review Letters*, vol. 96, no. 17, May 2006. *Epmc*, doi:10.1103/physrevlett.96.176802.
Full Text

Chandrasekharan, S., and A. C. Mehta. “Effects of the anomaly on the QCD chiral phase transition.” *Proceedings of Science*, vol. 32, Jan. 2006.

Chandrasekharan, S. “New approaches to strong coupling lattice QCD.” *Int. J. Mod. Phys.*, vol. B20, 2006, pp. 2714–23.

Yoo, J., et al. “On the sign problem in the Hirsch-Fye algorithm for impurity problems.” *Journal of Physics A: Mathematical and General*, vol. 38, no. 48, Dec. 2005, pp. 10307–10. *Scopus*, doi:10.1088/0305-4470/38/48/004.
Full Text

Kaul, R. K., et al. “Mesoscopic Kondo problem.” *Europhysics Letters*, vol. 71, no. 6, Sept. 2005, pp. 973–79. *Scopus*, doi:10.1209/epl/i2005-10184-1.
Full Text

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. *Epmc*, doi:10.1103/physreve.71.036708.
Full Text