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dc.contributor.author
Grinberg, Horacio
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dc.date.available
2017-06-12T19:56:37Z
dc.date.issued
2014-10
dc.identifier.citation
Grinberg, Horacio; Variance squeezing and information entropy squeezing via Bloch coherent states in two-level nonlinear spin models; Elsevier Gmbh; Optik; 125; 19; 10-2014; 5566-5572
dc.identifier.issn
0030-4026
dc.identifier.uri
http://hdl.handle.net/11336/18017
dc.description.abstract
The nonclassical squeezing effect emerging from a nonlinear coupling model (generalized Jaynes–Cummings model) of a two-level atom interacting resonantly with a bimodal cavity field via two-photon transitions is investigated in the rotating wave approximation. Various Bloch coherent initial states (rotated states) for the atomic system are assumed, i.e., (i) ground state, (ii) excited state, and (iii) linear superposition of both states. Initially, the atomic system and the field are in a disentangled state, where the field modes are in Glauber coherent states via Poisson distribution. The model is numerically tested against simulations of time evolution of the based Heisenberg uncertainty relation variance and Shannon information entropy squeezing factors. The quantum state purity is computed for the three possible initial states and used as a criterion to get information about the entanglement of the components of the system. Analytical expression of the total density operator matrix elements at t > 0 shows, in fact, the present nonlinear model to be strongly entangled, where each of the definite initial Bloch coherent states is reduced to statistical mixtures. Thus, the present model does not preserve the modulus of the Bloch vector.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Gmbh
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Variance Squeezing
dc.subject
Information Entropy
dc.subject
Bloch Coherernt States
dc.subject
Atomic Population Inversion
dc.subject.classification
Óptica
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Variance squeezing and information entropy squeezing via Bloch coherent states in two-level nonlinear spin models
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-12T18:06:14Z
dc.journal.volume
125
dc.journal.number
19
dc.journal.pagination
5566-5572
dc.journal.pais
Alemania
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dc.journal.ciudad
Stuttgart
dc.description.fil
Fil: Grinberg, Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
dc.journal.title
Optik
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.ijleo.2014.07.065
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0030402614008249?via%3Dihub
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