Rome 1 - 96 / 1147 Hybrid Molecular Dynamics for Lattice Supersymmetry

Instabilities in Molecular Dynamics Integrators used in Hybrid Monte Carlo Simulations

We discuss an instability in the leapfrog integration algorithm, widely used in current Hybrid Monte Carlo (HMC) simulations of lattice QCD. We demonstrate the instability in the simple harmonic oscillator (SHO) system where it is manifest. We demonstrate the instability in HMC simulations of lattice QCD with dynamical Wilson-Clover fermions and discuss implications for future simulations of la...

Simulation of the Dynamics of Polymers in Solution via a Hybrid Molecular Dynamics-Lattice Boltzmann Scheme

Higher Order Hybrid Monte Carlo at Finite Temperature

The standard hybrid Monte Carlo algorithm uses the second order integrator at the molecular dynamics step. This choice of the integrator is not always the best. We study the performance of the hybrid Monte Carlo algorithm for lattice QCD with higher order integrators in both zero and finite temperature phases and find that in the finite temperature phase the performance of the algorithm can be ...

RHMC simulation of two-dimensional N=(2,2) super Yang-Mills with exact supersymmetry

We report our numerical simulation of two-dimensional N = (2, 2) super Yang-Mills. The lattice model we use is one proposed by F. Sugino which keeps one exact supersymmetry at finite lattice spacing. We use Rational Hybrid Monte Carlo (RHMC) method to implement the dynamical fermion. We apply the simulation to measure the ground state energy which is useful to observe dynamical SUSY breaking. R...

ar X iv : h ep - t h / 96 01 12 5 v 1 2 3 Ja n 19 96 A ( 1 , 2 ) Heterotic String with Gauge Symmetry

We construct a (1,2) heterotic string with gauge symmetry and determine its particle spectrum. This theory has a local N=1 worldsheet supersymmetry for left movers and a local N=2 worldsheet supersymmetry for right movers and describes particles in either two or three space-time dimensions. We show that fermionizing the bosons of the compactified N=1 space leads to a particle spectrum which has...