Zobrazeno 1 - 10
of 333
pro vyhledávání: '"Schaefer Stefan"'
Autor:
Barca, Lorenzo, Knechtli, Francesco, Martins, Sofie, Peardon, Michael, Schaefer, Stefan, Urrea-Niño, Juan Andrés
This study explores the application of a two-level algorithm to enhance the signal-to-noise ratio of glueball calculations in four-dimensional $\mathrm{SU(3)}$ pure gauge theory. Our findings demonstrate that the statistical errors exhibit an exponen
Externí odkaz:
http://arxiv.org/abs/2406.12656
Autor:
Barca, Lorenzo, Knechtli, Francesco, Peardon, Michael, Schaefer, Stefan, Urrea-Niño, Juan Andrés
The computation of the glueball spectrum is particularly challenging due to the rapid decay of the signal-to-noise ratio of the correlation functions. To address this issue, advanced techniques such as gauge link smearing and the variational method a
Externí odkaz:
http://arxiv.org/abs/2312.11372
We propose a unifying approach that starts from the perturbative construction of trivializing maps by L\"uscher and then improves on it by learning. The resulting continuous normalizing flow model can be implemented using common tools of lattice fiel
Externí odkaz:
http://arxiv.org/abs/2212.08469
When designing lattice actions, gauge field smearing is frequently used to define the lattice Dirac operator. Since the smearing procedure removes effects of ultraviolet fluctuations, the fermions effectively see a larger lattice spacing than the gau
Externí odkaz:
http://arxiv.org/abs/2212.04000
Publikováno v:
EPJ Web of Conferences, Vol 175, p 11005 (2018)
We discuss the recently proposed multiboson domain-decomposed factorization of the gauge-field dependence of the fermion determinant in lattice QCD. In particular, we focus on the case of a lattice divided in an arbitrary number of thick time slices.
Externí odkaz:
https://doaj.org/article/c2a52caf00b540abbf8f882f8b4a5dc7
Publikováno v:
EPJ Web of Conferences, Vol 175, p 01003 (2018)
The numerical computations of many quantities of theoretical and phenomenological interest are plagued by statistical errors which increase exponentially with the distance of the sources in the relevant correlators. Notable examples are baryon masses
Externí odkaz:
https://doaj.org/article/26480e99a31c4c04a69b2c3dae7f681c
Publikováno v:
EPJ Web of Conferences, Vol 175, p 02010 (2018)
We report recent efforts by CLS to generate an ensemble with physical lightand strange-quark masses in a lattice volume of 192 × 963 at β = 3:55 corresponding to a lattice spacing of 0:064 fm. This ensemble is being generated as part of the CLS 2+1
Externí odkaz:
https://doaj.org/article/54bf3245335a467d9c969f5f9fc1630f
Autor:
Straßberger, Ben, Cè, Marco, Collins, Sara, Gérardin, Antoine, von Hippel, Georg, Korcyl, Piotr, Korzec, Tomasz, Mohler, Daniel, Risch, Andreas, Schaefer, Stefan, Söldner, Wolfgang, Sommer, Rainer
We present an update of the scale setting for $N_f=2+1$ flavor QCD using gradient flow scales and pseudo-scalar decay constants. We analyze the latest ensembles with $2+1$ flavors of non-perturbatively improved Wilson fermions generated by CLS for im
Externí odkaz:
http://arxiv.org/abs/2112.06696
Autor:
Mohler, Daniel, Schaefer, Stefan
Publikováno v:
Phys. Rev. D 102, 074506 (2020)
In the simulation of QCD with 2+1 flavors of Wilson fermions, the positivity of the fermion determinant is generally assumed. We present evidence that this assumption is in general not justified and discuss the consequences of this finding.
Comm
Comm
Externí odkaz:
http://arxiv.org/abs/2003.13359
In these proceedings we address the computation of quark-line disconnected diagrams in lattice QCD. The evaluation of these diagrams is required for many phenomenologically interesting observables, but suffers from large statistical errors due to the
Externí odkaz:
http://arxiv.org/abs/2001.08783