The RHMC algorithm for 2 flavours of dynamical staggered fermions
نویسندگان
چکیده
منابع مشابه
The RHMC Algorithm for 2 Flavours of Dynamical Staggered Fermions
Computations with two flavours of dynamical staggered quarks are quite popular at present. There are a number of possible problems with such calculations such as flavour symmetry breaking and non-locality of the square-root of the fourflavour action. In this investigation we shall ignore these and consider only the possible errors introduced through algorithmic approximations. We propose the us...
متن کاملComparing the R algorithm and RHMC for staggered fermions
The R algorithm is widely used for simulating two flavours of dynamical staggered fermions. We give a simple proof that the algorithm converges to the desired probability distribution to within O(δτ ) errors, but show that the relevant expansion parameter is (δτ/m), m being the quark mass. The Rational Hybrid Monte Carlo (RHMC) algorithm provides an exact (i.e., has no step size errors) alterna...
متن کاملOn the fourth root prescription for dynamical staggered fermions
With the aim of resolving theoretical issues associated with the fourth root prescription for dynamical staggered fermions in Lattice QCD simulations, we consider the problem of finding a viable lattice Dirac operator D such that (detDstaggered) 1/4 = detD. Working in the flavour field representation we show that in the free field case there is a simple and natural candidate D satisfying this r...
متن کاملDynamical Simulations with Smeared Link Staggered Fermions
One of the most serious problems of the staggered fermion lattice action is flavor symmetry violation. Smeared link staggered fermions can improve flavor symmetry by an order of magnitude relative to the standard thin link action. Over the last few years different smearing transformations have been proposed, both with perturbatively and non-perturbatively determined coefficients. What hindered ...
متن کاملstaggered fermions ∗
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 square root of the staggered fermion operator as a candidate to define a two taste theory from first principles. Although it has the correct weight,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2004
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)02732-4