Quantum

The Quantum Pontiff

Category archives for Quantum

A result of much quantum coolness out today: arXiv:0807.4935 (scirate): “Quantum Communication With Zero-Capacity Channels” by Graeme Smith and Jon Yard. Strange things they are going on when we try to use our quantum cell phones, it seems. Quantum cell phones, what the hell? Read on…

Not Cuil

Sure quantum computers can find a needle in an unstructured haystack quadratically faster than their classical brethren, but I didn’t think the word “quantum” and “search” would appear in the press quite this soon: Ex-Googlers reinvent web search: Quantum porn (not safe for work! i.e. they show the quantum porn!) and Quantum porn engine foiled…

SciRate Papers: 7/18 to 7/25

In attempt to keep my reading more current, I’m going to try to post the top rated arXiv papers on SciRate each week and hopefully add about the papers. Let’s see how long I can keep it up (bets?)

Devilish Dice Games

A new entry in the best title ever competition appeared last week on the arXiv: arXiv:0806.4874 Why devil plays dice? Authors: Andrzej Dragan Abstract: Principle of Relativity involving all, not only subluminal, inertial frames leads to the disturbance of causal laws in a way known from the fundamental postulates of Quantum Theory. We show how…

George Soros Meets Kochen-Specker

I’ll admit it: I like reading George Soros’ books. I mean, here’s a guy whose made a godzillion dollars in the financial markets, has been behind political destabilizations/stabilizations worldwide, taken on a U.S. president (can you guess which one?), and yet, in spite of this, can write a book in which he talks his own…

Hoisted from the comments, Robin asks: So, with that in mind, here’s a question. What do you think about teaching quantum mechanics as noncommutative probability theory? In other words, by starting with probability theory and alluding to probabilistic mechanics (e.g., distributions on phase space), and then introducing quantum theory as a generalization of probability. This…

Over at the Optimizer’s place, the Optimizer compares libertarians and those who believe in the many worlds interpretation of quantum theory. (Key Ron Paul apologists in three, two, one…) An amusing comparison. So if many worlders are the libertarians of interpretations of quantum theory, what political parties do the other interpretations of quantum theory fall…

In Probability We Trust?

When discussing ways that quantum computing may fail, a common idea is that it may turn out that the linearity of quantum theory fails. Since no one has seen any evidence of nonlinearity in quantum theory, and it is hard to hide this nonlinearity at small scales, it is usually reasoned that these nonlinearities would…

It was an unassuming blue-grey volume tucked away in the popular science section of the Siskiyou County Library. “Spacetime Physics” it announced proudly in gold letters across the front of the book. Published in 1965, the book looked as if it hadn’t been touched in the decades since 1965. A quick opening of the book…

John Archibald Wheeler (1911-2008)

I just learned the very sad news that John A. Wheeler has passed away. Wheeler was one of my heroes and inspired me in many ways to be where I am today. I’m buried under a heap of work today, but will write more when I can come up for air. Below I’ve pasted a…