Optimal cloning for finite distributions of coherent states

We derive optimal cloning limits for finite Gaussian distributions of coherent states, and describe techniques for achieving them. We discuss the relation of these limits to state estimation and the no-cloning limit in teleportation. A qualitatively different cloning limit is derived for a single-quadrature Gaussian quantum cloner.Comment: 15 pages RevTeX, 6 figures eps, submitted to PR

Conditional two mode squeezed vacuum teleportation

We show, by making conditional measurements on the Einstein-Podolsky-Rosen (EPR) squeezed vacuum, that one can improve the efficacy of teleportation for both the position difference, momentum sum and number difference, phase sum continuous variable teleportation protocols. We investigate the relative abilities of the standard and conditional EPR states, and show that by conditioning we can improve the fidelity of teleportation of coherent states from below to above the $\bar{F} = 2/3$ boundary.Comment: 18 pages, RevTeX4, 10 figures postscrip

Teleportation using coupled oscillator states

We analyse the fidelity of teleportation protocols, as a function of resource entanglement, for three kinds of two mode oscillator states: states with fixed total photon number, number states entangled at a beam splitter, and the two-mode squeezed vacuum state. We define corresponding teleportation protocols for each case including phase noise to model degraded entanglement of each resource.Comment: 21 pages REVTeX, manuscript format, 7 figures postscript, many changes to pape

Cost effectiveness of a community based exercise programme in over 65 year olds: cluster randomised trial

OBJECTIVE: To assess the cost effectiveness of a community based exercise programme as a population wide public health intervention for older adults. DESIGN: Pragmatic, cluster randomised community intervention trial. Setting: 12 general practices in Sheffield; four randomly selected as intervention populations, and eight as control populations. PARTICIPANTS: All those aged 65 and over in the least active four fifths of the population responding to a baseline survey. There were 2283 eligible participants from intervention practices and 4137 from control practices. INTERVENTION: Eligible subjects were invited to free locally held exercise classes, made available for two years. MAIN OUTCOME MEASURES: All cause and exercise related cause specific mortality and hospital service use at two years, and health status assessed at baseline, one, and two years using the SF-36. A cost utility analysis was also undertaken. RESULTS: Twenty six per cent of the eligible intervention practice population attended one or more exercise sessions. There were no significant differences in mortality rates, survival times, or admissions. After adjusting for baseline characteristics, patients in intervention practices had a lower decline in health status, although this reached significance only for the energy dimension and two composite scores (p,0.05). The incremental average QALY gain of 0.011 per person in the intervention population resulted in an incremental cost per QALY ratio of J17 174 (95% CI =J8300 to J87 120). CONCLUSIONS: Despite a low level of adherence to the exercise programme, there were significant gains in health related quality of life. The programme was more cost effective than many existing medical interventions, and would be practical for primary care commissioning agencies to implement

Peak Oil? Oil Supply and Accumulation

capital differential accumulation peak oilFROM THE ARTICLE: Peak oil will come. When it does, its effects on the global economy are uncertain. In the meantime, the oil companies must keep the following plates spinning: faith in oil as the energy source of capitalism, a high enough price to remain on top of the corporate world, a low enough and steady enough price to avoid contributing to a lengthy recession, or even a depression. While the differential perspective on accumulation makes it clear that growth is not synonymous with the corporate interest -- as long as everyone else is declining faster than you, then you are differentially accumulating -- depressions are dangerous for their unpredictability and their potential to threaten the capitalist status quo. . . . Undoubtedly, one of these plates will drop. The question is: which one? The consequences of the answer to that question will come more immediately than the geologically necessary peak in production and should be of greater concern

Differentiating Diamonds: Transforming Knowledge and the Accumulation of De Beers

advertising De Beers diamonds differential accumulation mass consumptionIn 1939, the De Beers diamond company faced a dire situation. The company’s accumulation had been dwindling for decades. The Great Depression not only pushed diamond sales to historic lows, it shifted American attitudes around consumption and thriftiness to the detriment of the luxury object. In this article, I bring together Liz McFall’s assertion that advertising needs to be studied as a “specific commercial device” with Jonathan Nitzan and Shimshon Bichler’s capitalas-power theory of value (CasP), which emphasizes differential accumulation. Both McFall and CasP challenge analyses that treat capitalism as an undifferentiated totality. It is from this perspective of differentiated commercial struggle that I analyze De Beers’ early advertising campaigns as well as the market research by N.W. Ayer that preceded them. My analysis focuses on an educational component intended to transform the diamond knowledge of the masses. The analysis demonstrates how the research informed the campaign that emerged in contingent relation with various facets of American society and was transformed by changes emergent with WWII

Death Grip: Scapegoating the Subprime Loser

Capitalizing morality and accumulating through crisis

The Enduring Power of GE

differential accumulation GE powerGeneral Electric (GE) has demonstrated extraordinary longevity in the upper echelon of U.S. corporations. From 1925 to 2013, the company has never fallen below 10th in the rankings of firms by market capitalization. The only other firm to match this feat is the oil giant ExxonMobil. GE’s durability is remarkable given the political, cultural, and technological tumult of the 20th century. In this presentation, I will consider possible reasons for GE’s dominance. This study of GE is part of an effort to develop a new field of Accumulation Studies. *** D.T. Cochrane. PhD student at the Graduate Program in Social and Political Thought, York University ([email protected]) This presentation is the fourth in the Second Speaker Series on the Capitalist Mode of Power, organized by capitalaspower.com and sponsored by the York Department of Political Science and the Graduate Program in Social and Political Thought. Refreshments will be served and all are welcome. WHEN: Tuesday, November 17, 2015, 3:00-5:00 pm WHERE: Verney Room, 674 South Ross, Keele Campus of York Universit

Castoriadis, Veblen and the 'Power Theory of Capital'

capital capitalization differential accumulation labour valueA critical examination of value theories, capital accumulation and organized powe