ar X iv : q ua nt - p h / 05 10 22 4 v 1 28 O ct 2 00 5 ON QUANTUM LYAPUNOV EXPONENTS

ar X iv : q ua nt - p h / 05 10 06 9 v 1 1 0 O ct 2 00 5 Uncertainty Principle and the Standard Quantum Limits ∗

The role of the Uncertainty Principle is examined through the examples of squeezing, information capacity, and position monitoring. It is suggested that more attention should be directed to conceptual considerations in quantum information science and technology.

ar X iv : q ua nt - p h / 05 10 00 8 v 1 2 O ct 2 00 5 Laser control for the optimal evolution of pure quantum states

D. Sugny, A. Keller, O. Atabek, D. Daems, C. M. Dion, S. Guérin, and H. R. Jauslin 1 Laboratoire de Physique de l’Université de Bourgogne, UMR CNRS 5027, BP 47870, 21078 Dijon, France 2 Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-Sud, Bât. 210 Campus d’Orsay, 91405 Orsay Cedex, France 3 Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles, 105...

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 / 04 10 22 9 v 1 27 O ct 2 00 4 A de Finetti Representation for Finite Symmetric Quantum States ∗

Consider a symmetric quantum state on an n-fold product space, that is, the state is invariant under permutations of the n subsystems. We show that, conditioned on the outcomes of an informationally complete measurement applied to a number of subsystems, the state in the remaining subsystems is close to having product form. This immediately generalizes the so-called de Finetti representation to...

ar X iv : q ua nt - p h / 05 10 11 4 v 1 14 O ct 2 00 5 Control of mixed - state quantum systems by a train of short pulses

D. Sugny, A. Keller, O. Atabek, D. Daems, C. M. Dion, S. Guérin, and H. R. Jauslin 1 Laboratoire de Physique de l’Université de Bourgogne, UMR CNRS 5027, BP 47870, 21078 Dijon, France 2 Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-Sud, Bât. 210 Campus d’Orsay, 91405 Orsay Cedex, France 3 Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles, 105...