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

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

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

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 8 . 24 05 v 1 [ qu an t - ph ] 1 7 A ug 2 00 7 PT - symmetry and Integrability ∗

We briefly explain some simple arguments based on pseudo Hermiticity, supersymmetry and PT -symmetry which explain the reality of the spectrum of some non-Hermitian Hamiltonians. Subsequently we employ PT -symmetry as a guiding principle to construct deformations of some integrable systems, the Calogero-Moser-Sutherland model and the Korteweg deVries equation. Some properties of these models ar...

ar X iv : 0 70 8 . 29 64 v 1 [ qu an t - ph ] 2 2 A ug 2 00 7 General multipartite entangled states and complex projective variety

We discuss and investigate the geometrical structure of general multipartite states. In particular, we show that a geometrical measure of entanglement for general multipartite states can be constructed by the complex projective varieties defined by quadratic polynomials.