Effective operator formalism for open quantum systems

Rotation operator formalism for open-shell omplexes

Operator formalism of quantum mechanics

This is the first chapter of a new and unconventional textbook on quantum mechanics and quantum field theory. The chapter introduces standard quantum mechanics by means of a symmetry principle, without reference to classical mechanics. The mathematical foundation of this approach comes from a recent paper of Naudts and Kuna on covariance systems. The standard representation of quantum mechanics...

Stabilizer formalism for operator quantum error correction.

Operator quantum error correction is a recently developed theory that provides a generalized and unified framework for active error correction and passive error avoiding schemes. In this Letter, we describe these codes using the stabilizer formalism. This is achieved by adding a gauge group to stabilizer codes that defines an equivalence class between encoded states. Gauge transformations leave...

Open Quantum Systems: Density Matrix Formalism and Applications

Conservation law of operator current in open quantum systems