High Temperature Superconductivity in the Cuprates

by Tommy on 18/09/2014
High Temperature Superconductivity in the Cuprates

High Temperature Superconductivity in the Cuprates

http://arxiv.org/abs/1409.4673

High Temperature Superconductivity in the Cuprates, B. Keimer, S. A. Kivelson, M. R. Norman, S. Uchida and J. Zaanen

The discovery of high temperature superconductivity in the cuprates in 1986 triggered a spectacular outpouring of creative and innovative scientific inquiry. Much has been learned over the ensuing 28 years about the novel forms of quantum matter that are exhibited in this strongly correlated electron system. This progress has been made possible by improvements in sample quality, coupled with the development and refinement of advanced experimental techniques. In part, avenues of inquiry have been motivated by theoretical developments, and in part new theoretical frameworks have been conceived to account for unanticipated experimental observations. An overall qualitative understanding of the nature of the superconducting state itself has been achieved, while profound unresolved issues have come into increasingly sharp focus concerning the astonishing complexity of the phase diagram, the unprecedented prominence of various forms of collective fluctuations, and the simplicity and insensitivity to material details of the “normal” state at elevated temperatures. New conceptual approaches, drawing from string theory, quantum information theory, and various numerically implemented approximate approaches to problems of strong correlations are being explored as ways to come to grips with this rich tableaux of interrelated phenomena.

This review should get you started and up to speed on recent developments.

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The Delta 9 Reusable Launch Vehicle

by Tommy on 27/08/2014

http://lifeform.net/tsiolkovsky/Delta_9_RLV.pdf

I have unretired briefly to do this for the United States Air Force (USAF).

The Delta 9 reusable launch vehicle concept consists essentially of a SpaceX Falcon 9R clone, implemented in hydrogen fuel, using recently developed and tested Blue Origin BE-3 engines.

The intent of such a program is to produce separate propulsion, airframe and operations sectors for the emerging commercial space flight industry in the same way our current airline industries are structured. This specific vehicle is designed in such a way as to motivate our legacy aerospace companies to begin participating substantively and competitively in this new commercial spaceflight industry, within their respective market niches and areas of expertise, while driving the industry forward with substantial Air Force funding, in much the same way that NASA has done with the COTS program, but focused more on specific Department of Defense space launch needs, with near term operational time frames (2018). The most obvious existing tank suitable for modification into the required launch vehicle would be the Boeing Delta IV Medium, but alternative airframe providers and technologies would not be ruled out.

So yeah, I’m a rocket scientist and a space architect. Now all I need is a rocket.

Enjoy!

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