Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Dromard, Arthur"'
Autor:
Mejía-Díaz, Héctor, Bietenholz, Wolfgang, Cichy, Krzysztof, de Forcrand, Philippe, Dromard, Arthur, Gerber, Urs, Sandoval, Ilya O.
We study the impact of the Gradient Flow on the topology in various models of lattice field theory. The topological susceptibility $\chi_{\rm t}$ is measured directly, and by the slab method, which is based on the topological content of sub-volumes (
Externí odkaz:
http://arxiv.org/abs/1712.01395
Autor:
Alexandrou, Constantia, Athenodorou, Andreas, Cichy, Krzysztof, Dromard, Arthur, Garcia-Ramos, Elena, Jansen, Karl, Wenger, Urs, Zimmermann, Falk
In this paper, we show a comparison of different definitions of the topological charge on the lattice. We concentrate on one small-volume ensemble with 2 flavours of dynamical, maximally twisted mass fermions and use three more ensembles to analyze t
Externí odkaz:
http://arxiv.org/abs/1708.00696
In simulations of a model with topological sectors, algorithms which proceed in small update steps tend to get stuck in one sector, especially on fine lattices. This distorts the numerical results; in particular it is not straightforward to measure t
Externí odkaz:
http://arxiv.org/abs/1610.00685
The topological susceptibility is an important quantity in QCD, which can be computed using lattice methods. However, at a fine lattice spacing, or when using high quality chirally symmetric quarks, algorithms which proceed in small update steps ---
Externí odkaz:
http://arxiv.org/abs/1605.08637
Autor:
Bietenholz, Wolfgang, Czaban, Christopher, Dromard, Arthur, Gerber, Urs, Hofmann, Christoph P., Mejía-Díaz, Héctor, Wagner, Marc
Publikováno v:
Phys. Rev. D 93, 114516 (2016)
For quantum field theories with topological sectors, Monte Carlo simulations on fine lattices tend to be obstructed by an extremely long auto-correlation time with respect to the topological charge. Then reliable numerical measurements are feasible o
Externí odkaz:
http://arxiv.org/abs/1603.05630
In lattice quantum field theories with topological sectors, simulations at fine lattice spacings --- with typical algorithms --- tend to freeze topologically. In such cases, specific topological finite size effects have to be taken into account to ob
Externí odkaz:
http://arxiv.org/abs/1510.08809
Lattice QCD simulations tend to get stuck in a single topological sector at fine lattice spacing, or when using chirally symmetric quarks. In such cases computed observables differ from their full QCD counterparts by finite volume corrections, which
Externí odkaz:
http://arxiv.org/abs/1505.03435
Autor:
Bautista, Irais, Bietenholz, Wolfgang, Dromard, Arthur, Gerber, Urs, Hofmann, Christoph P., Gonglach, Lukas, Mejía-Díaz, Héctor, Wagner, Marc
Publikováno v:
Phys. Rev. D 92, 114510 (2015)
For field theories with a topological charge Q, it is often of interest to measure the topological susceptibility chi_t = ( < Q^2 > - < Q >^2 ) / V. If we manage to perform a Monte Carlo simulation where Q changes frequently, chi_t can be evaluated d
Externí odkaz:
http://arxiv.org/abs/1503.06853
Autor:
Cichy, Krzysztof, Dromard, Arthur, Garcia-Ramos, Elena, Ottnad, Konstantin, Urbach, Carsten, Wagner, Marc, Wenger, Urs, Zimmermann, Falk
Publikováno v:
PoS LATTICE2014 (2014) 075
We present a comparison of different definitions of the topological charge on the lattice, using a small-volume ensemble with 2 flavours of dynamical twisted mass fermions. The investigated definitions are: index of the overlap Dirac operator, spectr
Externí odkaz:
http://arxiv.org/abs/1411.1205
Lattice QCD simulations tend to get stuck in a single topological sector at fine lattice spacing, or when using chirally symmetric quarks. In such cases computed observables differ from their full QCD counterparts by finite size effects, which need t
Externí odkaz:
http://arxiv.org/abs/1410.4333