ar X iv : 0 70 8 . 14 09 v 2 [ qu an t - ph ] 1 5 M ar 2 00 9 Diffusive spin transport ∗ Cord

ar X iv : 0 70 8 . 14 09 v 1 [ qu an t - ph ] 1 0 A ug 2 00 7 Diffusive spin transport ∗ Cord

Information to be stored and transported requires physical carriers. The quantum bit of information (qubit) can for instance be realised as the spin 1 2 degree of freedom of a massive particle like an electron or as the spin 1 polarisation of a massless photon. In this lecture, I first use irreducible representations of the rotation group to characterise the spin dynamics in a least redundant m...

ar X iv : 0 90 8 . 38 09 v 1 [ he p - ph ] 2 6 A ug 2 00 9 HADRONIC AND SPIN PHYSICS : REVIEW

I will summarize the numerous contributions which were presented in the session Hadronic and Spin Physics, largely dominated by new experimental results.

ar X iv : 0 70 5 . 31 55 v 2 [ qu an t - ph ] 9 O ct 2 00 7 Observation of Topological and Parity - dependent Phase of m = 0 Spin States

A Ramsey interrogation scheme was used to measure the phase shift of laser-cooled Rb clocktransition pseudospins arising as a result of a reversal of a bias magnetic field, i.e., B → −B, during the interrogation. While no phase shift occurred when the reversal was sudden, the Ramsey fringes were shifted by a factor of π when the reversal was adiabatic. We thus verified the prediction that the s...

ar X iv : 0 80 8 . 10 23 v 1 [ qu an t - ph ] 7 A ug 2 00 8 CATEGORICAL QUANTUM MECHANICS

ar X iv : 0 70 5 . 19 96 v 2 [ qu an t - ph ] 1 5 M ay 2 00 7 Critique of “ Quantum Enigma : Physics encounters Consciousness ”

The central claim that understanding quantum mechanics requires a conscious observer, which is made made by B. Rosenblum and F. Kuttner in their book ”Quantum Enigma: Physics encounters consciousnes”, is shown to be based on various misunderstandings and distortions of the foundations of quantum mechanics.