Scholars@Duke
Shailesh Chandrasekharan

Shailesh Chandrasekharan

Professor of Physics
Physics
Box 90305, Durham, NC 27708-0305
Science Drive, 253, Physics/Math Bldg., Durham, NC 27708

Scholarly Works - Conferences

Three-dimensional Gross-Neveu model with two flavors of staggered fermions

Conference Proceedings of Science · July 8, 2022 We introduce a strongly interacting lattice field theory model containing two flavors of massless staggered fermions with two kind of interactions: (1) a lattice current-current interaction, and (2) an on-site four-fermion interaction. At weak couplings, w ... Cite

Baryon bag simulation of QCD in the strong coupling limit

Conference PoS LATTICE2019 (2019) 117 · August 27, 2020 We explore the possibility of a simulation of strong coupling QCD in terms of so-called baryon bags. In this form the known representation in terms of monomers, dimers and baryon loops is reorganized such that the baryon contributions are collected in spac ... Open Access Cite

Quantum Critical Phenomena in an O(4) Fermion Chain

Conference PoS LATTICE2019 (2019) 222 · August 27, 2020 We construct a fermionic lattice model containing interacting spin-half fermions with an O(4) symmetry. In addition the model contains a Z2 chiral symmetry which prevents a fermion mass term. Our model is motivated by the ability to study its physics usin ... Cite

Generating a mass gap using Feynman diagrams in an asymptotically free theory

Conference EPJ Web of Conferences · March 26, 2018 Using the example of a two dimensional four-fermion lattice field theory, we show that Feynman diagrams can generate a mass gap in a theory with massless fermions that interact via a marginally relevant coupling. We show this by introducing an infrared cut ... Full text Cite

Worldline approach to few-body physics on the Lattice

Conference Proceedings of Science · January 1, 2018 We study the physics of two species of non-relativistic hard-core bosons with attractive or repulsive delta function interactions on a spacetime lattice using the worldline formulation. By tuning the chemical potential carefully we show that worm algorithm ... Cite

Fermion bags, topology and index theorems

Conference Proceedings of Science · January 1, 2016 The fermion bag formulation helps to extend the concepts of topology and index theorem associated with non-Abelian gauge theories to simple lattice fermion field theories. Using this extension we can argue that fermion masses can arise either through the t ... Cite

Quantum critical behavior with massless staggered fermions in three dimensions

Conference Proceedings of Science · January 1, 2013 We report on studies of quantum critical behavior in three dimensional lattice Gross-Neveu models with one flavor of staggered fermions. We focus on two models, one with SU(2)×Z2 symmetry and the other with an SU(2)×U(1) symmetry. Both these models could n ... Cite

-Resonance and convergence of chiral perturbation theory

Conference Proceedings of Science · January 1, 2008 The dimensionless parameter′ = M2/(16π2F2), where F is the pion decay constant in the chiral limit and M is the pion mass at leading order in the quark mass, is expected to control the convergence of chiral pertu ... Cite

Confined and Deconfined Phases of Qubit Regularized Lattice Gauge Theories

Conference We construct quantum Monte Carlo methods for simple qubit regularized gauge theories in various dimensions that do not suffer from sign problems. Results from these calculations suggest that these theories contain both confined and deconfined phases. Finit ... Cite

Symmetric Mass Generation via Multicriticality in a 3D Lattice Gross–Neveu Model

Conference We study the phase diagram of massless staggered fermions with two distinct four-fermion couplings, UB and UI, on a 3D Euclidean lattice using the fermion-bag Monte Carlo method. The model exhibits three phases: massless fermions (PMW), symmetry-broken mas ... Cite