SQUIDs for Everything Else

Fabio Pulizzi

Nicolas Gisin

I argue against the many-world interpretation (MWI) of quantum theory by emphasizing that when everything is entangled with everything else, in one big monstrous piece, there is no room left for creativity. Since the MWI was invented, it proves itself wrong (appeared first in French in [N. Gisin, L'épidémie du multivers, in Le plus grand des hasards, p. 184, eds J.F. Dars et A. Papillault, Belin 2010]).

M. P. Blencowe

Gabriela Mogos

A random number generator produces a periodic sequence of numbers on a computer. The starting point can be random, but after it is chosen, everything else is deterministic. A random number generator produces a periodic sequence of numbers on a computer. The starting point can be random, but after it is chosen, everything else is deterministic. This paper presents the entropy and p-value tests performed on classical and quantum random number generators, in order to check the randomness of the generated output data. Both generators have been integrated in software applications reproducing asymmetrical cryptosystems, their results contributing to the generation of key material within Diffie-Hellman protocol. Can regard these tests as a first step in determining if a generator is suitable for a particular cryptographic application. At the same time, the statistical tests cannot serve as a substitute for cryptanalysis.

Demetris Nicolaides

Abstract Anaxagoras proposed “in everything there is a portion of everything,” a notion as bizarre as the most popular interpretation of quantum theory, the Copenhagen. A piece of gold, say, contains gold as well as everything else—copper, wheat—but appears as a distinct golden object because its gold portion is the greatest. But no part of the object is pure. Every part of the golden object is also simultaneously watery, milky (and all other materials), and black and white (and all opposite qualities). In the Copenhagen interpretation, before an observation, something (an electron, Schrödinger’s cat) is all opposite qualities simultaneously, too, with each quality described by a unique probability (“portion”) to actually occur. The cat is both dead and alive; the electron spins simultaneously both clockwise and counterclockwise. Only after the observation, the cat is found either dead or alive, and the object, as Anaxagoras would say, definitely golden, yellow, and dry.

V. J. de Waal