Conveners
Stochastic Trace Estimation
- Stefan Schaefer
Stochastic Trace Estimation
- Stefan Schaefer
Stochastic Trace Estimation
- Mike Peardon
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26. Interpolation as a means of shift selection in multilevel Monte Carlo with lattice displacementsDr Travis Whyte (College of William & Mary)15/08/2022, 15:10
The calculation of disconnected diagram contributions to physical signals is
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a computationally expensive task in Lattice QCD. To extract the physical
signal, the trace of the inverse Lattice Dirac operator, a large sparse matrix,
must be stochastically estimated. Because the variance of the stochastic es-
timator is typically large, variance reduction techniques must be... -
Jakob Simeth (University of Regensburg)15/08/2022, 16:50
We summarize our results for the $\eta$ and $\eta^\prime$ masses and
their four independent decay constants at the physical point as well as
their anomalous gluonic matrix elements $a_{\eta^{(\prime)}}$.The computation employs twenty-one $N_f=2+1$ Coordinated Lattice
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Simulations (CLS) ensembles with non-perturbatively improved Wilson
fermions at four different lattice spacings and... -
Gunnar Bali (Universität Regensburg)17/08/2022, 10:40
A precise knowledge of nucleon axial formfactors is needed for the new generation of terrestrial neutrino experiments. This is particularly challenging due to increased contamination, in this sector, from excitations, in particular from $N\pi$ scattering states. Transitions from a $N$ to a $N\pi$, mediated by an axial current are also interesting themselves, as these can be related to neutrino...
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Giannis Koutsou17/08/2022, 11:20
We present results obtained for disconnected fermion loops contributing to nucleon observables using simulations of twisted mass lattice QCD with physical quark masses and three lattice spacings. We focus on the methods employed, including multi-grid, hierarchical probing, low-mode deflation, and the so-called one-end trick.
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