Pure and Mixed States
Alves Barata JC, Brum M, Chabu V, Correa da Silva R (2021)
Publication Type: Journal article, Review article
Publication year: 2021
Journal
Book Volume: 51
Pages Range: 244
Article Number: 262
Journal Issue: 2
URI: https://link.springer.com/article/10.1007/s13538-020-00808-0
DOI: 10.1007/s13538-020-00808-0
Abstract
We present a review on the notion of pure states and mixtures as mathematical concepts that apply for both classical and quantum physical theories, as well as for any other theory depending on statistical description. Here, states will be presented as expectation values on suitable algebras of observables, in a manner intended for the non-specialist reader; accordingly, basic literature on the subject will be provided. Examples will be exposed together with a discussion on their meanings and implications. An example will be shown where a pure quantum state converges to a classical mixture of particles as Planck’s constant tends to 0.
Authors with CRIS profile
Additional Organisation(s)
Involved external institutions
University of São Paulo / Universidade de São Paulo (USP)
Brazil (BR)
Universidade Federal do Rio de Janeiro (UFRJ) / Federal University of Rio de Janeiro
Brazil (BR)
Brazil (BR)
Universidade Federal do Rio de Janeiro (UFRJ) / Federal University of Rio de Janeiro
Brazil (BR)
How to cite
APA:
Alves Barata, J.C., Brum, M., Chabu, V., & Correa da Silva, R. (2021). Pure and Mixed States. Brazilian Journal of Physics, 51(2), 244. https://dx.doi.org/10.1007/s13538-020-00808-0
MLA:
Alves Barata, João Carlos, et al. "Pure and Mixed States." Brazilian Journal of Physics 51.2 (2021): 244.
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