Zobrazeno 1 - 10
of 6 679
pro vyhledávání: '"P. De Leeuw"'
Autor:
Corcoran, Luke, de Leeuw, Marius
We construct the first integrable models based on the Haagerup fusion category $H_3$. We introduce a Haagerup version of the anyonic spin chain and use the boost operator formalism to identify two integrable Hamiltonians of PXP type on this chain. Th
Externí odkaz:
http://arxiv.org/abs/2410.16356
Autor:
de Leeuw, Jan
We define *fDistances*, which generalize Euclidean distances, squared distances, and log distances. The least squares loss function to fit fDistances to dissimilarity data is *fStress*. We give formulas and R/C code to compute partial derivatives of
Externí odkaz:
http://arxiv.org/abs/2407.18314
Autor:
de Leeuw, Jan
Modifications of the smacof algorithm for multidimensional scaling are proposed that provide a convergent majorization algorithm for Kruskal's stress formula two.
Comment: 16 pages, 4 figures, R code
Comment: 16 pages, 4 figures, R code
Externí odkaz:
http://arxiv.org/abs/2407.18313
Autor:
de Leeuw, Jan
The full-dimensional (metric, Euclidean, least squares) multidimensional scaling stress loss function is combined with a quadratic external penalty function term. The trajectory of minimizers of stress for increasing values of the penalty parameter i
Externí odkaz:
http://arxiv.org/abs/2407.16645
Autor:
De Leeuw, Jan
To study convergence of SMACOF we introduce a modification mSMACOF that rotates the configurations from each of the SMACOF iterations to principal components. This modification, called mSMACOF, has the same stress values as SMACOF in each iteration,
Externí odkaz:
http://arxiv.org/abs/2407.12945
Autor:
de Leeuw, Marius, Holguin, Adolfo
In this paper we classify integrable conformal defects in N=4 SYM theory for which the scalar fields pick up a non-trivial vacuum expectation value. Defects of this form correspond to Dirichlet boundary conditions that have a pole at the defect. Thes
Externí odkaz:
http://arxiv.org/abs/2406.13741
We initiate a systematic study of integrable models for spin chains with constrained Hilbert spaces; we focus on spin-1/2 chains with the Rydberg constraint. We extend earlier results for medium-range spin chains to the constrained Hilbert space, and
Externí odkaz:
http://arxiv.org/abs/2405.15848
Photocatalysis, a promising solution for environmental challenges, relies on the generation and utilization of photogenerated charge carriers within photocatalysts. However, recombination of these carriers often limits efficiency. Heterostructures, e
Externí odkaz:
http://arxiv.org/abs/2403.09866
Publikováno v:
JHEP10(2024)096
In this letter we use a perturbative approach to find the spectrum of non-relativistic strings in the String Newton-Cartan (SNC) AdS$_5\times$S$^5$ spacetime. We perturb the bosonic sector of the action around a BMN-like folded string solution in lig
Externí odkaz:
http://arxiv.org/abs/2403.09563
Within the domain of e-commerce retail, an important objective is the reduction of parcel loss during the last-mile delivery phase. The ever-increasing availability of data, including product, customer, and order information, has made it possible for
Externí odkaz:
http://arxiv.org/abs/2310.16602