ar X iv : q ua nt - p h / 02 07 09 6 v 2 1 7 Se p 20 02 Measurement of qutrits

ar X iv : q ua nt - p h / 02 07 09 6 v 1 1 7 Ju l 2 00 2 Measurement of qutrits

We proposed the procedure of measuring the unknown state of the three-level system – the qutrit, which was realized as the arbitrary polarization state of the single-mode biphoton field. This procedure is accomplished for the set of the pure states of qutrits; this set is defined by the properties of SU(2) transformations, that are done by the polarization transformers.

ar X iv : q ua nt - p h / 02 06 11 6 v 1 1 8 Ju n 20 02 Five Lectures On Dissipative Master Equations

ar X iv : q ua nt - p h / 02 09 10 1 v 1 1 7 Se p 20 02 COVARIANT PHASE DIFFERENCE OBSERVABLES

Covariant phase difference observables are determined in two different ways, by a direct computation and by a group theoretical method. A characterization of phase difference observables which can be expressed as difference of two phase observables is given. Classical limit of such phase difference observables are determined and the Pegg-Barnett phase difference distribution is obtained from th...

ar X iv : q ua nt - p h / 02 12 09 7 v 3 4 A ug 2 00 5 Parity Effects in Spin Decoherence

A. Melikidze, V. V. Dobrovitski, H. A. De Raedt, M. I. Katsnelson, and B. N. Harmon Kavli Institute for Theoretical Physics, University of California, Santa Barbara CA 93106, USA Ames Laboratory, Iowa State University, Ames IA 50011, USA 3 Applied Physics Computational Physics, Materials Science Centre, University of Groningen, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands Uppsala Univers...

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.