𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Factoring the unitary evolution operator and quantifying entanglement

✍ Scribed by X.X. Yi; C.P. Sun

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
75 KB
Volume
262
Category
Article
ISSN
0375-9601

No coin nor oath required. For personal study only.

✦ Synopsis

The unitary evolution can be represented by a finite product of exponential operators. It leads to a perturbative expression of the density operator of a close system. Based on the perturbative expression scheme, we present an entanglement measure. This measure has the advantage that it is easy to compute for a general dynamical process.

πŸ“œ SIMILAR VOLUMES

Unitary couplings, scattering suboperato
Unitary couplings, scattering suboperators and regular factorizations of bounded operator valued functions II
✍ S. S. Boiko; V. K. Dubovoy πŸ“‚ Article πŸ“… 2005 πŸ› John Wiley and Sons 🌐 English βš– 288 KB

## Abstract In the paper bilateral shifts are studied which generate factorizations of unitary couplings (in the system theory they play the part of channels). Subspaces of __L__^2^(π”Ž), reducing the multiplication operator by __e__^__it__^, are investigated in the channel language. New criteria for