10 citations · 11 across the 3 of their papers we have counts for
4 papers · 1 filter
A note on improved stochastic trace estimation for fermionic string fluctuations
Valentina Forini, Bjoern Leder, Nils Wauschkuhn
We report on the use of a stochastic trace estimator algorithm, based on mutually unbiased bases, for evaluating the trace of a matrix differential operator appearing in the contex…
Strings on the lattice and AdS/CFT
Valentina Forini, Lorenzo Bianchi, Bjoern Leder +2
We present a new auxiliary field representation for the four-fermi term of the gauge-fixed Green-Schwarz superstring action which describes fluctuations around the null-cusp backgr…
Cutoff effects in the O(N) sigma model at large N
Ulli Wolff, Francesco Knechtli, Bjoern Leder +1
The computation of the step scaling function for the finite size mass-gap in the O(N) sigma model at large N is reviewed. Practically exact nonperturbative results become available…
Cutoff Effects in O(N) Nonlinear Sigma Models
Francesco Knechtli, Bjoern Leder, Ulli Wolff
In the nonlinear O(N) sigma model at N=3 unexpected cutoff effects have been found before with standard discretizations and lattice spacings. Here the situation is analyzed further…