Local Invariants and Pairwise Entanglement in Symmetric Multi-qubit System

Pairwise entanglement properties of a symmetric multi-qubit system are analyzed through a complete set of two-qubit local invariants. Collective features of entanglement, such as spin squeezing, are expressed in terms of invariants and a classifcation scheme for pairwise entanglement is proposed. The invariant criteria given here are shown to be related to the recently proposed (Phys. Rev. Lett. 95, 120502 (2005)) generalized spin squeezing inequalities for pairwise entanglement in symmetric multi-qubit states.Comment: 9 pages, 2 figures, REVTEX, Replaced with a published versio

Collective multipole-like signatures of entanglement in symmetric N-qubit systems

A cogent theory of collective multipole-like quantum correlations in symmetric multiqubit states is presented by employing SO(3) irreducible spherical tensor representation. An arbitrary bipartite division of this system leads to a family of inequalities to detect entanglement involving averages of these tensors expressed in terms of the total system angular momentum operator. Implications of this theory to the quantum nature of multipole-like correlations of all orders in the Dicke states are deduced. A selected set of examples illustrate these collective tests. Such tests detect entanglement in macroscopic atomic ensembles, where individual atoms are not accessible.Comment: REVTEX, 4 pages with 1 figure; To appear in Phys. Rev.

Non-local properties of a symmetric two-qubit system

Non-local properties of symmetric two-qubit states are quantified in terms of a complete set of entanglement invariants. We prove that negative values of some of the invariants are signatures of quantum entanglement. This leads us to identify sufficient conditions for non-separability in terms of entanglement invariants. Non-local properties of two-qubit states extracted from (i) Dicke state (ii) state generated by one-axis twisting Hamiltonian, and (iii) one-dimensional Ising chain with nearest neighbour interaction are analyzed in terms of the invariants characterizing them.Comment: 5 pages, no figure

Mining Consumer Knowledge from Shopping Experience: A case study on Indian E_Commerce Industry

E_Commerce becomes far much popular in recent years. E Commerce nowadays is almost everywhere. People go through online ; meanwhile, they are more and more accustomed to buy goods via E_Commerce channel. - The E-Commerce web sites are facing lots of problems today. Customers prefer traditional way to purchase the products and not from E-Commerce web sites. If we see the history of E-Commerce, then we get that E-Commerce is the purpose of Internet and the web to conduct business Even in recession, it is thriving and has become one of the most important consumption modes. This study uses cluster analysis to identify the profiles of E_Commerce consumers. The rules between E_Commerce spokespersons and commodities from consumers are recognized by using association analysis. Depicting the marketing knowledge map of spokespersons, the best endorsement portfolio is found out to make recommendations. By the analysis of spokespersons, period, customer profiles and products, four business modes of E_Commerce are proposed for consumers: new product, knowledge, low price and luxury product; the related recommendations are also provided for the industry reference

Pengaruh Good Governance, Budaya Organisasi, Gaya Kepemimpinan, Komitmen Organisasi, Dan Pengendalian Intern Terhadap Kinerja Pemerintah Daerah (Studi Empiris- Pada Skpd Kabupaten Pelalawan)

The purpose of this study was to test the Effect of Good Governance, Organization Culture, Leadership Style, Organizational Commitment and Intern Control on Local Government Performance (Study In SKPD of Pelalawan). The location of this research is all SKPD of Pelalawan Regency. In this study, the population used is SKPD of Pelalawan Regency. Respondents in this study is the structural officials involved in drafting the budget. In total there are 31 SKPD. Every SKPD will be given three questionnaires, so the number of questionnaires distributed is 93 pieces. The data used are primary data. Data Collection Techniques of field research and literature. The analytical method used in this research is multiple regression analysis.Based on the analysis, the conclusions of this research are: 1) There is a significant effect of Good Governance on Local Government Performance. 2) There is a significant effect of Organization Culture on Local Government Performance. 3) There is a significant effect of Leadership Style on Local Government Performance. 4) There is a significant effect of Organizational Commitment on Local Government Performance. 5) There is a significant effect of Intern Control on Local Government Performance. Based on the research results it was concluded that the determination coefficient is 61.6%. It means that 61.6% of Local Government Performance variations can be explained by the variable Good Governance, Organization Culture, Leadership Style, Organizational Commitment and Intern Control. While 38.4% is explained by other variables outside the model

Perencanaan Ulang Struktur Gedung Tahan Gempa Menggunakan Metode Dinding Geser Yang Mengacu Pada Sni – 1726 – 2012 Pada Gedung Dekanat Fakultas Teknik Universitas Brawijaya

Kemajuan ilmu dan teknologi berpengaruh besar dalam perkembangan Indonesia di segala aspek, terutama dalam aspek pembangunan. Pemerintah berperan aktif dalam mewujudkan pembangunan dalam rangka memenuhi kebutuhan hidup manusia yang beragam. Bsolusi untuk menciptakan bangunan tinggi dalam mengatasi masalah tersebut. Sesuai pedoman peraturan gempa terbaru SNI – 1726 – 2012 terdapat delapan alternatif sistem atau subsistem yang dapat digunakan dalam merencanakan struktur gedung bertingkat tinggi yang tahan terhadap gempa. Salah satu sistem yang saat ini menjadi alternatif adalah sistem dinding geser. Dalam hal ini dilakukan perencanaan ulang Gedung Dekanat Fakultas Teknik Universitas Brawijaya yang terdiri dari delapan lantai. Tujuan dari penulisan tugas akhir ini adalah untuk memperoleh besarnya momen, gaya lintang, dan gaya lateral yang akan digunakan untuk menghitung luas tulangan dan dimensi elemen struktur balok, kolom, dan dinding geser. Konsep perencanaan yang digunakan adalah metode kekuatan yang biasanya disebut dengan ultimate strength method, dimana beban bekerja pada elemen struktur dinaikkan secukupnya dengan beberapa faktor reduksi untuk mendapatkan beban yang mana keruntuhan dinyatakan “telah diambang pintu” atau biasa disebut juga dengan beban berfakor. Pada perencanaan ulang ini dilakukan beberapa Perubahan terhadap desain awal yaitu Perubahan desain gedung, dimensi elemen struktur, dan dinding geser. Perencanaan tulangan lentur dan tulangan geser dibatasi pada Portal E yang dianggap telah mewakili portal yang lainnya. Dari hasil perhitungan untuk tulangan lentur balok dan kolom diperoleh tulangan D22 dan untuk tulangan geser diperoleh Ø10 dengan jarak sengkang yang berbeda – beda. Untuk dinding geser diperoleh tulangan horizontal dan tulangan vertikal yaitu Ø10 – 200 (2 lapis). Hasil perhitungan yang didapat digunakan untuk gambar detail penulangan. Kata

Implementation System of Business Intelligence System In The Company

This study aims to determine the stages that must be implemented in building a Business Intelligence System structured and appropriate in building Business Intelligence Systems in an organization, and understand the important aspects that must be considered for investment development Business Intelligence System is increasing. Business must be based on the conditions and needs of the organization in achieving the desired goals. If these conditions occur, then the decision-making process will be better and more accurate. The purpose of this study is to determine the important aspects that must be understood and prepared in using the Business Intelligence System in an organization. The method used is the explanation as well as the research library of several books, articles and other literature

The dependence of the estimated luminosities of ULX on spectral models

Data from {\it Chandra} observations of thirty nearby galaxies were analyzed and 365 X-ray point sources were chosen whose spectra were not contaminated by excessive diffuse emission and not affected by photon pile up. The spectra of these sources were fitted using two spectral models (an absorbed power-law and a disk blackbody) to ascertain the dependence of estimated parameters on the spectral model used. It was found that the cumulative luminosity function depends on the choice of the spectral model, especially for luminosities $> 10^{40}$ ergs/s. In accordance with previous results, a large number ($\sim 80$) of the sources have luminosities $> 10^{39}$ ergs/s (Ultra-Luminous X-ray sources) with indistinguishable average spectral parameters (inner disk temperature $\sim 1$ keV and/or photon index $\Gamma \sim 2$) with those of the lower luminosities ones. After considering foreground stars and known background AGN,we identify four sources whose minimum luminosity exceed $10^{40}$ ergs/s, and call them Extremely Luminous X-ray sources (ELX). The spectra of these sources are in general better represented by the disk black body model than the power-law one. These ELX can be grouped into two distinct spectral classes. Two of them have an inner disk temperature of $< 0.5$ keV and hence are called ``supersoft'' ELX, while the other two have temperatures $\gtrsim 1.3$ keV and are called ``hard'' ELX. The estimated inner disk temperatures of the supersoft ELX are compatible with the hypothesis that they harbor intermediate size black holes, which are accreting at $\sim 0.5$ times their Eddington Luminosity. The radiative mechanism for hard ELX, seems to be Inverse Comptonization, which in contrast to standard black holes systems, is probably saturated.Comment: Accepted for publication in Astrophysical Journal. 9 pages. Complete long Tables 4 and 5 are given as tab4.tex and tab5.tex separatel