Time evolution of statistical properties of a radiation field described by a density operator that interpolates between pure and mixing states
| Autor: | C. J. S. Ferreira, B. Baseia, T. M. Silva |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Quantum decoherence
Solid-state physics business.industry Time evolution Complex system Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Electronic Optical and Magnetic Materials symbols.namesake 0103 physical sciences symbols Statistical physics Photonics Quantum information 010306 general physics business Entropy (arrow of time) Mathematics Von Neumann architecture |
| Zdroj: | The European Physical Journal B. 92 |
| ISSN: | 1434-6036 1434-6028 |
| DOI: | 10.1140/epjb/e2019-100335-3 |
| Popis: | In this work, we consider a different model of density operator and a heuristic procedure that interpolates a photonic system from pure to mixed states. It is interpreted as if, during the time evolution of the system, the variables of a (hidden) system reservoir being traced. The aim is to study the time evolution of statistical properties while the system loses its initial purity. For this purpose, the system impurity, the evolution of Mandel parameter and entropy were calculated. A comparison between Shannon and von Neumann entropies in the present scenario is done, which could be of interest in quantum information. Another comparison, between the present approach with the traditional treatment concerning decoherence of a system state, was also considered. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink