ar X iv : q ua nt - p h / 03 11 00 6 v 1 3 N ov 2 00 3 Continuous - variable quantum cryptography is secure against non - gaussian attacks

ar X iv : q ua nt - p h / 04 11 17 2 v 1 2 3 N ov 2 00 4 Information and Entropy in Quantum Theory

ar X iv : q ua nt - p h / 06 11 18 7 v 1 1 7 N ov 2 00 6 Philosophical Aspects of Quantum Information Theory

2 First steps with quantum information 3 2.1 Bits and qubits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 The no-cloning theorem . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 Quantum cryptography . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3.1 Key Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Entanglement-as...

ar X iv : q ua nt - p h / 03 09 02 9 v 1 2 S ep 2 00 3 Rule ( 4 ) and Continuous Observation Richard

The effect of rule (4) on a series or parallel sequence of quantum mechanical steps is to insure that a conscious observer does not skip a step. This rule effectively places the observer in continuous contact with the system.

ar X iv : q ua nt - p h / 02 03 04 6 v 1 1 1 M ar 2 00 2 Quantum imaging

We provide a brief overview of the newly born field of quantum imaging, and discuss some concepts that lie at the root of this field.

ar X iv : q ua nt - p h / 06 11 14 4 v 1 1 4 N ov 2 00 6 Geometrical structure of entangled states and secant variety

We show that the secant variety of the Segre variety gives useful information about the geometrical structure of an arbitrary multipartite quantum system. In particular, we investigate the relation between arbitrary bipartite and three-partite entangled states and this secant variety. We also discuss the geometry of an arbitrary general multipartite state.