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pro vyhledávání: '"Bunk B"'
We address the locality problem arising in simulations, which take the square root of the staggered fermion determinant as a Boltzmann weight to reduce the number of dynamical quark tastes from four to two. We study analytically and numerically the s
Externí odkaz:
http://arxiv.org/abs/hep-lat/0408048
Publikováno v:
Nucl.Phys. B697 (2004) 343-362
We address the locality problem arising in simulations, which take the square root of the staggered fermion determinant as a Boltzmann weight to reduce the number of dynamical quark tastes. A definition of such a theory necessitates an underlying loc
Externí odkaz:
http://arxiv.org/abs/hep-lat/0403022
We report new results from our finite size scaling analysis of 4d compact pure U(1) gauge theory with Wilson action. Investigating several cumulants of the plaquette energy within the Borgs-Kotecky finite size scaling scheme we find strong evidence f
Externí odkaz:
http://arxiv.org/abs/hep-lat/0210010
Autor:
Bunk, B.
Publikováno v:
Nucl.Phys.Proc.Suppl.63B:952,1998
The fractional inverse $M^{-\gamma}$ (real $\gamma >0$) of a matrix $M$ is expanded in a series of Gegenbauer polynomials. If the spectrum of $M$ is confined to an ellipse not including the origin, convergence is exponential, with the same rate as fo
Externí odkaz:
http://arxiv.org/abs/hep-lat/9805030
Publikováno v:
Comput.Phys.Commun. 118 (1999) 95-109
The numerical construction of polynomials in the product representation (as used for instance in variants of the multiboson technique) can become problematic if rounding errors induce an imprecise or even unstable evaluation of the polynomial. We giv
Externí odkaz:
http://arxiv.org/abs/hep-lat/9805026
Autor:
Bunk, B.
Publikováno v:
Nucl.Phys.Proc.Suppl. 53 (1997) 987-989
Subspace iterations are used to minimise a generalised Ritz functional of a large, sparse Hermitean matrix. In this way, the lowest $m$ eigenvalues are determined. Tests with $1 \leq m \leq 32$ demonstrate that the computational cost (no. of matrix m
Externí odkaz:
http://arxiv.org/abs/hep-lat/9608109
Publikováno v:
Nucl.Phys.Proc.Suppl. 42 (1995) 49-55
A previously introduced multi-boson technique for the simulation of QCD with dynamical quarks is described and some results of first test runs on a $6^3\times12$ lattice with Wilson quarks and gauge group SU(2) are reported.
Comment: 7 pages, po
Comment: 7 pages, po
Externí odkaz:
http://arxiv.org/abs/hep-lat/9411016
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