Nonlocality, Asymmetry, and Distinguishing Bipartite States

Entanglement is an useful resource because some global operations cannot be locally implemented using classical communication. We prove a number of results about what is and is not locally possible. We focus on orthogonal states, which can always be globally distinguished. We establish the necessary and sufficient conditions for a general set of 2x2 quantum states to be locally distinguishable, and for a general set of 2xn quantum states to be distinguished given an initial measurement of the qubit. These results reveal a fundamental asymmetry to nonlocality, which is the origin of ``nonlocality without entanglement'', and we present a very simple proof of this phenomenon.Comment: 5 pages, 1 figure. Improved in line with referees comments, references added, typo corrected. To appear in Phys. Rev. Let

London Live Goes Live: What about Media Plurality in UK’s Capital?

London’s new local television channel, London Live is due to launch on the 31st of March. Its owner also owns the city’s largest circulation local newspaper and two national newspapers. University of East London’s Jonathan Hardy discusses the implications for media plurality arguing that the key question is how the new service will be regulated

Local Distinguishability of Multipartite Orthogonal Quantum States

We consider one copy of a quantum system prepared in one of two orthogonal pure states, entangled or otherwise, and distributed between any number of parties. We demonstrate that it is possible to identify which of these two states the system is in by means of local operations and classical communication alone. The protocol we outline is both completely reliable and completely general - it will correctly distinguish any two orthogonal states 100% of the time.Comment: 5 pages, revte

Tackling the edge dynamic graph colouring problem with and without future adjacency information

Many real world operational research problems, such as frequency assignment and exam timetabling, can be reformulated as graph colouring problems (GCPs). Most algorithms for the GCP operate under the assumption that its constraints are fixed, allowing us to model the problem using a static graph. However, in many real-world cases this does not hold and it is more appropriate to model problems with constraints that change over time using an edge dynamic graph. Although exploring methods for colouring dynamic graphs has been identified as an area of interest with many real-world applications, to date, very little literature exists regarding such methods. In this paper we present several heuristic methods for modifying a feasible colouring at time-step t into an initial, but not necessarily feasible, colouring for a “similar” graph at time-step t+1t+1 . We will discuss two cases; (1) where changes occur at random, and (2) where probabilistic information about future changes is provided. Experimental results are also presented and the benefits of applying these particular modification methods are investigated

Modifying colourings between time-steps to tackle changes in dynamic random graphs

Many real world operational research problems can be formulated as graph colouring problems. Algorithms for this problem usually operate under the assumption that the size and constraints of a problem are fixed, allowing us to model the problem using a static graph. For many problems however, this is not the case and it would be more appropriate to model such problems using dynamic graphs. In this paper we will explore whether feasible colourings for one graph at time-step t can be modified into a colouring for a similar graph at time-step t+1 in some beneficial manner

Branded Content: The Fateful Merging of Media and Marketing

This is a critical study of the changing relationship between media and marketing communications in the digital age. It examines the growth of content funded by brands, including brands’ own media, native advertising and the integration of branded content across film, television, journalism and publishing, online, mobile and social media. With a focus on key issues in industry, policy and academic contexts this is essential reading for students of media industries, advertising, marketing and digital media. This ambitious historical, empirical, and theoretical study examines industry practices, policies, and ‘problems’, advancing a framework for analysis of communications governance. Featuring examples from the UK, US, EU, Asia, and other regions, it illustrates and explains industry practices, forms, and formats and their relationship with changing market conditions, policies, and regulation. The book provides a wide-ranging and incisive guide to contemporary advertising and media practices, to different arguments and perspectives on these practices arising in industry, policy, and academic contexts, and to the contribution made by critical scholarship, past and present. It also offers a critical review of industry, regulatory, societal, and academic literatures

Stratégies de réalisation de guides polymères pour la modulation électro-optique à haut débit

National audienceDe nouveaux polymères électro-optiques, sont mis en œuvre pour réaliser des guides selon deux types d'ingénierie de matériaux. L'une consiste à utiliser un polymère non-linéaire greffé et réticulable et l'autre utilise un matériau hôte, ayant une température de transition vitreuse élevée. Nous présentons ici, les difficultés rencontrées lors de la réalisation des guides et les stratégies développées pour aboutir, avec ces nouveaux matériaux, à des guides optiques monomodes

Commentary: Branded Content and Media-Marketing Convergence

Your Facebook feed says “Recommended for you” and “Sponsored”. Your online magazine says “Paid Content”, another in Buzzfeed (2014) says “Promoted Content” and lists “12 Backpacking Hacks That Are Vital For Business Trips” in an article paid for by Holiday Inn Express. Buzzfeed may also list KFC as “Brand Publisher” for an article, “11 Things All Busy Families Should Make Time For”, including KFC’s Popcorn Nuggets (Buzzfeed, 2015). You read a powerful series of articles on hunger in America, but it is labelled “paid programme”, produced by the Wall Street Journal’s Custom Studios in collaboration with Mini, and includes such branded wisdom as “Mini owners are all different. There’s no one person that Mini drivers look like. It’s the same with food insecurity. It’s all walks of life”. From television product placement to mobile news feeds, brands are burrowing into media content. Exploring that merging of media and marketing was a key impetus behind the Branded Content Research Network, launched in late 2016. It aims to facilitate collaboration between academics, industry professionals and civil society to explore branded content practices and their media policy implications. Here are my reflections on some of the research tasks and policy issues arising from this collective endeavour

L'espace public de Jürgen Habermas, réexaminé à la lumière de ses écrits de jeunesse

L'espace public (1962) de Jürgen Habermas est souvent lu comme le premier ouvrage de sa carrière. Notre mémoire tâche de porter un éclairage différent sur celui-ci, de lire L'espace public comme point d'aboutissement de la pensée habermassienne des années 1950. Par l'exploration d'un certain nombre d'écrits mineurs et majeurs pré-1962, L'espace public se révèle une sorte de théorie critique de la société, encore fortement empreinte de marxisme, faisant figure de synthèse partielle des écrits de jeunesse.Jürgen Habermas' The structural transformation of the public sphere (1962) is often read as the first landmark of his career. Our study sets out to shed a different light upon it, to read The structural transformation of the public sphere as the arrival point of Habermas' 1950s thought. While we explore a certain number of minor and major pre-1962 works, his thesis reveals itself as some kind of critical theory of society, still deeply rooted in Marxism, that embodies a partial synthesis of his early works

Economics: Ownership and Competion

The ways newspapers developed as products for readers was influenced by their costs and financing, forms of ownership and market competition. This chapter explores the economics of print and online news publishing in Britain and Ireland from 1900 to 2018 and examines the patterns of ownership, concentration and competition in the national, regional and local newspaper markets. The chapter explores the relationship between the financing of the press, market competition and ownership patterns and shows how these have mutually influenced provision. The chapter integrates original analysis of primary and secondary sources and draws on the author’s research on media and advertising relationships to trace the significance of advertising subsidy for publications, up to contemporary challenges, including falling ad revenues for print, and business responses including advertiser sponsored content. The chapter also provides original table data setting out newspaper ownership and circulation for the period