Historical magic in old quantum theory?

Historical Magic in Old Quantum Theory

Two successes of old quantum theory are particularly notable: Bohr’s prediction of the spectral lines of ionised helium, and Sommerfeld’s prediction of the fine-structure of the hydrogen spectral lines. Many scientific realists would like to be able to explain these successes in terms of the truth or approximate truth of the assumptions which fuelled the relevant derivations. In this paper I ar...

Quantum Magic in Artificial Crystals

they also facilitate completely new approaches, for instance in data processing. To better understand them, the team working with Immanuel Bloch, Director at the Max Planck Institute of Quantum Optics in Garching, is using atoms in optical lattices to simulate quantum matter. In doing so, they have repeatedly observed a behavior of matter that contradicts our everyday experience. Quantum Magic ...

Quantum Computing without Magic: Devices

Noise Effects in Quantum Magic Squares Game

Quantum game theory, the subclass of game theory that involves quantum phenomena, lies at the crossroads of physics, quantum information processing, computer and natural sciences. Thanks to entanglement, quantum players can sometimes accomplish tasks that are impossible for their classical counterparts. In this paper we present the detailed analysis of one of the pseudo-telepathy games. These g...

Models of an atom and old quantum theory

• Thompson modeled an atom as a sphere of radius ∼ 1Å (typical atom radius) lled uniformly by a cloud of positive charge Ze. Inside this cloud there are Z point-like electrons which sit still at their equilibrium positions determined by Coulomb forces. Under various circumstances, for example at by raising temperature, electrons can be excited into vibrating or orbiting motion. Such accelerated...