198,788 research outputs found
Exploring Representation Theory of Unitary Groups via Linear Optical Passive Devices
No full textIn this paper, we investigate some mathematical structures underlying the physics of linear optical passive (LOP) devices. We show, in particular, that with the class of LOP
transformations on N optical modes one can associate a unitary representation of U(N) in the N-mode Fock space, representation which can be decomposed into irreducible sub-representations living in the subspaces characterized by a fixed number of photons. These (sub-)representations
can be classified using the theory of representations of semi-simple Lie algebras. The remarkable case where N = 3 is studied in detail
Engineering multiphoton states for linear optics computation
No full textTransformations achievable by linear optical components
allow to generate the whole unitary group only when restricted to the one-photon subspace of a multimode Fock space. In this paper, we address the more general problem of encoding quantum information by multiphoton states, and elaborating it via ancillary extensions, linear optical passive devices and photodetection. Our scheme stems
in a natural way from the mathematical structures underlying the physics of linear optical passive devices. In particular, we analyze an economical procedure for mapping a fiducial 2-photon 2-mode state into an arbitrary 2-photon 2-mode state using ancillary resources and linear optical passive N-ports assisted by post-selection. We found that adding a single ancilla mode is enough to generate any
desired target state. The effect of imperfect photodetection in post-selection is considered and a simple trade-off between success probability and fidelity is derived
Laicità e gratuità. Risorse per il dialogo interreligioso nella prospettiva di Giorgio Palumbo
No full textThe essay attempts to think of gratuitousness within secularity as the engine of a hospitable reason capable of welcoming difference and placing itself in fruitful dialogue with it in accordance with the conditions of possibility illustrated by Giorgio Palumbo's perspective
Whole genome analysis of the Lupo Italiano
No full textThe Lupo Italiano (Italian Wolfdog) is a domestic dog (Canis lupus familiaris) breed created in 1966 by crossing of Apennine grey wolves (Canis lupus italicus) to German Shepherd dogs (GSD). The breed has an official studbook with management protocols, under the control of the Ministry of Agriculture. The breed is characterized by strength, resistance, and strong capabilities in learning, as well as participation in search and rescue activities. Considering the depth and completeness of genealogical information, the high levels of inbreeding, and the presence of the wolf as a recent ancestor, the Lupo Italiano can be used as a model to investigate the effects of population structure and selection on wolf-dog hybridization. The aim of this work is to compare the genetic background of the Italian Wolfdog with that of the GSD, village dogs, grey wolves from the Apennines, and other dog populations, with a specific goal of detailing introgression between the Lupo Italiano, wolf and GSD. Three hundred and seventy-seven individuals were genotyped using a high density chip containing more than 170K SNPs. Genotypes for Lupo Italiano were provided by University of Milano and National Institutes of Health in Bethesda, MD. Those for the Apennine wolves were produced by ISPRA, and those for GSD, village dogs and grey wolves were publicly available (Dryad, Shannon et al. 2015). Samples and loci were quality checked, and then analyzed using Multi-Dimensional Scaling (MDS). The relationship matrix based on pedigrees was compared with the genomic relationship matrix (GRM), calculated using GCTA64 software. In addition, the genomic heterozygosity-based inbreeding coefficient has been estimated using PLINK v1.9 software. Reynolds distances were computed to define the relationships among the five populations. In addition, the Lupo Italiano, wolves and GSD were studied at the chromosomal level. As expected, the closest population to the Lupo Italiano is the German Shepherd dog (Reynold genetic distance 0.25), whereas the farthest is the Apennine Wolf (0.40). Results are expected to provide a clear picture of the genomic structure of the Lupo Italiano and its hybridization history. Beside scientific interest, these findings will allow the breeder association (AAALI) to better manage their animals and conserve breed genetic variation
La fiducia di un certo restare
No full textReferring to Leonardo Samona's position and his reading of Heidegger's philosophy, the essay analyzes the relationship between philosophy and faith and their differences and analogies
The UN-SUSTAINABLE Match in HCV Recipients. Evidences from the Italian D-MELD Study on Balancing Donor-Recipient Risk Factors
No full textThe UN-SUSTAINABLE Match in HCV Recipients. Evidences from the Italian D-MELD Study on Balancing Donor-Recipient Risk Factor
- …
