Experimentally feasible set of criteria detecting genuine multipartite entanglement in n-qubit Dicke states and in higher dimensional systems

We construct a set of criteria detecting genuine multipartite entanglement in arbitrary dimensional multipartite systems. These criteria are optimally suited for detecting multipartite entanglement in n-qubit Dicke states with m-excitations. In a detailed analysis we show that the criteria are also more robust to noise than any other criterion known so far, especially with increasing system size. Furthermore it is shown that the number of required local observables scales only polynomially with size, thus making the criteria experimentally feasible.Comment: 4 pages, 2 figure

Experimentally implementable criteria revealing substructures of genuine multipartite entanglement

We present a general framework that reveals substructures of genuine multipartite entanglement. Via simple inequalities it is possible to discriminate different sets of multipartite qubit states. These inequalities are beneficial regarding experimental examinations as only local measurements are required. Furthermore, the number of observables scales favorably with system size. In exemplary cases we demonstrate the noise resistance and discuss implementations.Comment: 14 pages, 4 figure

Разработка информационной системы формата "Вопрос-Ответ" (Q&A) с использованием Ruby on Rails

Объект исследования: системы формата "Вопрос-ответ" и использование фреймворка Ruby on Rails для разработки информационной системы. Целью работы является разработка системы формата "Вопрос-ответ" (Q&A), используя фреймворк Ruby on Rails.Object of study: questions and answers information systems and development information system using Ruby on Rails. Goal: development Q&A information system using Ruby on Rails framework

The <i>cbb</i> ₃ -type cytochrome oxidase assembly factor CcoG is a widely distributed cupric reductase

Significance Copper (Cu) is a cofactor of many enzymes in prokaryotes and eukaryotes, but Cu toxicity challenges cuproprotein biogenesis. To prevent Cu-induced damage while sustaining Cu supply for cuproproteins, cells possess sophisticated Cu transport and storage networks. P 1B -type ATPases and Cu chaperones are central to these networks and preferentially bind Cu(I). However, under aerobic conditions, Cu exists primarily as Cu(II), and hence Cu(II) reduction is essential for Cu transport/storage. Eukaryotic organisms achieve this process via cell-surface exposed metalloreductases. For bacteria, it was generally assumed that the reducing environment of the cytoplasm would suffice to generate Cu(I). However, our findings now show that this dogma is incomplete, as we have identified a bacterial cupric reductase that reduces Cu(II) in the bacterial cytosol. </jats:p