Real-time quantum evolution in the classical approximation and beyond
Entity
UAM. Departamento de Física TeóricaDate
2012-11-05Citation
10.1103/PhysRevD.86.103504
Physical Review D 86.10 (2012): 103504
ISSN
1550-7998 (print); 1550-2368 (online)DOI
10.1103/PhysRevD.86.103504Funded by
We acknowledge financial support from the MCINN Grants No. FPA2009-08785 and No. FPA2009-09017, the Comunidad Autónoma de Madrid under the Program No. HEPHACOS S2009/ESP- 1473, and the European Union under Grant Agreement No. PITN-GA-2009-238353 (ITN STRONGnet). The authors participate in the Consolider-Ingenio 2010 CPAN (CSD2007-00042). We acknowledge the use of the IFT clusters for part of our numerical resultsProject
Comunidad de Madrid. S2009/ESP-1473/HEPHACOS; info:eu-repo/grantAgreement/EC/FP7/238353Editor's Version
http://dx.doi.org/10.1103/PhysRevD.86.103504Subjects
FísicaRights
© 2012 American Physical SocietyAbstract
With the goal in mind of deriving a method to compute quantum corrections for the real-time evolution in quantum field theory, we analyze the problem from the perspective of the Wigner function. We argue that this provides the most natural way to justify and extend the classical approximation. A simple proposal is presented that can allow us to give systematic quantum corrections to the evolution of expectation values and/or an estimate of the errors committed when using the classical approximation. The method is applied to the case of a few degrees of freedom and compared with other methods and with the exact quantum results. An analysis of the dependence of the numerical effort involved as a function of the number of variables is given, which allows us to be optimistic about its applicability in a quantum field theoretical context
Files in this item
Google Scholar:González-Arroyo España, Antonio
-
Nuevo, Fermín
This item appears in the following Collection(s)
Related items
Showing items related by title, author, creator and subject.
-
Approximate Methods for the Real-Time Evolution of Quantum Systems and Fields
Nuevo, Fermín
2012 -
An 8-mm diameter fibre robot positioner for massive spectroscopy surveys
Fahim, N.; Prada, F.; Kneib, J. P.; González de Rivera Peces, Guillermo José; Hörler, P.; Sánchez, J.; Azzaro, M.; Becerril, S.; Bleuler, H.; Bouri, M.; Castaño, J.; Garrido, J.; Gillet, D.; Gómez, C.; Gómez, M. A.; González-Arroyo España, Antonio; Jenni, L.; Makarem, L.; Yepes Alonso, Gustavo; Arrillaga, X.; Carrera, M. A.; Diego, R.; Charif, M.; Hug, M.; Lachat, C.
2015-06-11