Browsing Duke Faculty Articles by Author "0201561"

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Conductance of quantum impurity models from quantum Monte Carlo

Liu, Dong E.; Chandrasekharan, Shailesh; Baranger, Harold (AMER PHYSICAL SOC, 2010)

The conductance of two Anderson impurity models, one with twofold and another with fourfold degeneracy, representing two types of quantum dots, is calculated using a world-line quantum Monte Carlo (QMC) method. Extrapolation ...
Fermion bag approach to lattice field theories

Chandrasekharan, Shailesh (AMER PHYSICAL SOC, 2010)

We propose a new approach to the fermion sign problem in systems where there is a coupling U such that when it is infinite the fermions are paired into bosons, and there is no fermion permutation sign to worry about. We ...
Finite size effects in the presence of a chemical potential: A study in the classical nonlinear O(2) sigma model

Chandrasekharan, Shailesh (AMER PHYSICAL SOC, 2010)

In the presence of a chemical potential, the physics of level crossings leads to singularities at zero temperature, even when the spatial volume is finite. These singularities are smoothed out at a finite temperature but ...
Phase transitions of S=1 spinor condensates in an optical lattice

Chandrasekharan, Shailesh (AMER PHYSICAL SOC, 2009)

We study the phase diagram of spin-one polar condensates in a two-dimensional optical lattice with magnetic anisotropy. We show that the topological binding of vorticity to nematic disclinations allows for a rich variety ...