Search results for "camp"

Analyse comparée des critères de la première molaire inférieure entre différentes populations du campagnol basque Microtus (Terricola) lusitanicus (G…

2009

9 pages; National audience; L'objectif de cette étude est l'analyse comparée des critères de la première molaire inférieure (M1) entre sept groupes géographiques du campagnol basque Microtus (Terricola) lusitanicus (Gerbe, 1879) répartis sur l'ensemble de l'aire de répartition de l'espèce. Le principal résultat est la différenciation du groupe des Pyrénées françaises, caractérisé en particulier par un développement réduit de la partie antérieure de la M1. Dans les groupes géographiques ibériques, des différences morphologiques sont trouvées pour chaque critère, mais ces différences sont moins significatives que celles observées pour le groupe des Pyrénées françaises. Le statut sub-spécifiqu…

Segmentation, involvement and the reach-engagementrelationship: evidence from a QR code advertising campaign

2013

This paper presents a procedure that practitioners must follow before assessing the reach-­‐engagement relationship in a “pull” campaign. It is suggested to check for the independence between this relationship and that between segmentation and product involvement. If the two relationships are independent, then segmentation becomes less relevant when assessing the reach-­‐engagement relationship. Otherwise, an unobservable segmentation variable must be accounted for in the reach-­‐engagement relationship. These aspects of segmentation are never mentioned in the extant literature, which treats segmentation in “pull” campaigns the same way in which targeting is designed in “push” campaigns. Th…

La qualità percepita dai clienti della Grande distribuzione: disegno di ricerca e tecnica di campionamento

2009

Scaling On-Chip Entangled Photon States to Higher Dimensions

2017

Considerable efforts have recently focused on advancing quantum information pro- cessing by increasing the number of qubits (the simplest unit of quantum information) in nonclassical systems such as ultracold atoms and superconducting circuits. A complementary approach to scale up infor- mation content is to move from two-level (qubit) to multilevel (quDit) systems.

On-chip generation of high-dimensional entangled quantum states and their coherent control

2017

Optical quantum states based on entangled photons are essential for solving questions in fundamental physics and are at the heart of quantum information science1. Specifically, the realization of high-dimensional states (D-level quantum systems, that is, qudits, with D > 2) and their control are necessary for fundamental investigations of quantum mechanics2, for increasing the sensitivity of quantum imaging schemes3, for improving the robustness and key rate of quantum communication protocols4, for enabling a richer variety of quantum simulations5, and for achieving more efficient and error-tolerant quantum computation6. Integrated photonics has recently become a leading platform for the co…

Practical system for the generation of pulsed quantum frequency combs

2017

The on-chip generation of large and complex optical quantum states will enable low-cost and accessible advances for quantum technologies, such as secure communications and quantum computation. Integrated frequency combs are on-chip light sources with a broad spectrum of evenly-spaced frequency modes, commonly generated by four-wave mixing in optically-excited nonlinear micro-cavities, whose recent use for quantum state generation has provided a solution for scalable and multi-mode quantum light sources. Pulsed quantum frequency combs are of particular interest, since they allow the generation of single-frequency-mode photons, required for scaling state complexity towards, e.g., multi-photon…

Complex quantum state generation and coherent control based on integrated frequency combs

2019

The investigation of integrated frequency comb sources characterized by equidistant spectral modes was initially driven by considerations towards classical applications, seeking a more practical and miniaturized way to generate stable broadband sources of light. Recently, in the context of scaling the complexity of optical quantum circuits, these on-chip approaches have provided a new framework to address the challenges associated with non-classical state generation and manipulation. For example, multi-photon and high-dimensional states were to date either inaccessible, lacked scalability, or were difficult to manipulate, requiring elaborate approaches. The emerging field of quantum frequen…

On-chip frequency combs and telecommunications signal processing meet quantum optics

2018

Entangled optical quantum states are essential towards solving questions in fundamental physics and are at the heart of applications in quantum information science. For advancing the research and development of quantum technologies, practical access to the generation and manipulation of photon states carrying significant quantum resources is required. Recently, integrated photonics has become a leading platform for the compact and cost-efficient generation and processing of optical quantum states. Despite significant advances, most on-chip nonclassical light sources are still limited to basic bi-photon systems formed by two-dimensional states (i.e., qubits). An interesting approach bearing …

Medium effects in DIS from polarized nuclear targets

2014

The behavior of the nucleon structure functions in lepton nuclei deep inelastic scattering, both polarized and unpolarized, due to nuclear structure effects is reanalyzed. The study is performed in two schemes: an x-rescaling approach, and one in which there is an increase of sea quark components in the in medium nucleon, related to the low energy N-N interaction. In view of a recent interesting experimental proposal to study the behavior of the proton spin structure functions in nuclei we proceed to compare these approaches in an effort to enlighten the possible phenomenological interest of such difficult experiment.

The pion distribution amplitude and the pion-photon transition form factor in a nonlocal chiral quark model

2014

We study the pion Distribution Amplitude (\pi DA) in the context of a nonlocal chiral quark model. The corresponding Lagrangian reproduces the phenomenological values of the pion mass and decay constant, as well as the momentum dependence of the quark propagator obtained in lattice calculations. It is found that the obtained \pi DA has two symmetric maxima, which arise from the new contributions generated by the nonlocal character of the interactions. This \pi DA is applied to leading order and next-to-leading order calculations of the pion-photon transition form factor. Implications of the results are discussed.