How good must single photon sources and detectors be for efficient linear optical quantum computation?

We present a scheme for linear optical quantum computation (LOQC) which is highly robust to imperfect single photon sources and inefficient detectors. In particular we show that if the product of the detector efficiency with the source efficiency is greater than 2/3, then efficient LOQC is possible. This threshold is many orders of magnitude more relaxed than those which could be inferred by application of standard results in fault tolerance. The result is achieved within the cluster state paradigm for quantum computation.Comment: New version contains an Added Appendi

Loss tolerant linear optical quantum memory by measurement-based quantum computing

We give a scheme for loss tolerantly building a linear optical quantum memory which itself is tolerant to qubit loss. We use the encoding recently introduced in Varnava et al 2006 Phys. Rev. Lett. 97 120501, and give a method for efficiently achieving this. The entire approach resides within the 'one-way' model for quantum computing (Raussendorf and Briegel 2001 Phys. Rev. Lett. 86 5188–91; Raussendorf et al 2003 Phys. Rev. A 68 022312). Our results suggest that it is possible to build a loss tolerant quantum memory, such that if the requirement is to keep the data stored over arbitrarily long times then this is possible with only polynomially increasing resources and logarithmically increasing individual photon life-times

Technology transfer - A selected bibliography

Selected bibliography on technology transfe

Secondary Users of Aerospace Biomedical Technology

An urban freeway is treated as a dynamic process. A state model for the freeway is obtained with sectional traffic densities as states and entrance flow rates as controls. A linear programming problem is solved to obtain the optimal freeway densities and entrance flow rates under steady-state conditions, and a state regulator is used to minimize the deviations in traffic densities from these optimal steady-state values

The Serendiptichord: Reflections on the collaborative design process between artist and researcher

The Serendiptichord is a wearable instrument, resulting from a collaboration crossing fashion, technology, music and dance. This paper reflects on the collaborative process and how defining both creative and research roles for each party led to a successful creative partnership built on mutual respect and open communication. After a brief snapshot of the instrument in performance, the instrument is considered within the context of dance-driven interactive music systems followed by a discussion on the nature of the collaboration and its impact upon the design process and final piece

Project for the analysis of technology transfer Quarterly report, 13 Jul. - 12 Oct. 1968

Statistical characteristics of transfer data bank users, and outline of technology transfer and utilization instruction cours

How useful is thematic analysis as an elicitation technique for analyzing video of human gait in forensic podiatry?

The aim of this study was to evaluate how useful thematic analysis is in the elicitation of observations of gait from a video recording. This was undertaken by providing a video recording of human gait to “novice” and “expert” podiatry students. The observations were explored using the qualitative tool of thematic analysis. The exploration of human gait using this technique gave a rich abundance of information and demonstrated that a basic level of experience or knowledge is required to provide a simple description of human gait. With more expertise came a richer description of observation of human gait by the “expert” group compared to basic observations by the “novice” group. Thematic analysis allows the use of language and the depth of the information to be evaluated when observing human gait from a video recording

Norham West Mains Farm borehole : operations report

A borehole was drilled to a total depth of 501.33 m by Drilcorp Ltd at Norham West Mains Farm, near the village of Norham, Berwick upon Tweed. Work was commenced on the 27th of March 2013 and completed on 7th Obtaining cores from the Norham West Mains Farm Borehole is a major task within the TW:eed Project, which is investigating how limbed vertebrates adapted to walk on land around 360 million years ago (see June 2013. The borehole was fully cored from 10.22 m to its total depth through rocks of the Lower Carboniferous Inverclyde Group. http://www.tetrapods.org/). This was a key stage in the evolution of life on Earth and shaped the future evolution of vertebrates, including the eventual appearance of humans. The project builds on some unique new fossil finds made recently in the Scottish Borders and adjacent areas. Analysis of the borehole will provide a framework upon which this research is to be pinned. This scientific research programme is being undertaken by a consortium of organisations led by the University of Cambridge, and including the universities of Southampton and Leicester, the National Museums of Scotland and the British Geological Survey, and funded through the Natural Environment Research Council

Project for the analysis of technology transfer Quarterly evaluation report, 13 Oct. - 12 Dec. 1968

Technical support package usage documentation by technology transfer analysis projec