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Photonic Nambu-Goldstone bosons

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Photonic Nambu-Goldstone bosons

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dc.contributor.author	García March, Miguel Ángel
dc.contributor.author	Paredes, Angel
dc.contributor.author	Zacarés, Mario
dc.contributor.author	Michinel, Humberto
dc.contributor.author	Ferrando Cogollos, Albert
dc.date.accessioned	2018-04-16T14:06:02Z
dc.date.available	2018-04-16T14:06:02Z
dc.date.issued	2017
dc.identifier.citation	García March, Miguel Ángel Paredes, Angel Zacarés, Mario Michinel, Humberto Ferrando Cogollos, Albert 2017 Photonic Nambu-Goldstone bosons Physical review, A, Atomic, molecular, and optical physics 96 5 053848-1 053848-13
dc.identifier.uri	http://hdl.handle.net/10550/65694
dc.description.abstract	We study numerically the spatial dynamics of light in periodic square lattices in the presence of a Kerr term, emphasizing the peculiarities stemming from the nonlinearity. We find that, under rather general circumstances, the phase pattern of the stable ground state depends on the character of the nonlinearity: the phase is spatially uniform if it is defocusing whereas in the focusing case, it presents a chessboard pattern, with a difference of π between neighboring sites. We show that the lowest-lying perturbative excitations can be described as perturbations of the phase and that finite-sized structures can act as tunable metawaveguides for them. The tuning is made by varying the intensity of the light that, because of the nonlinearity, affects the dynamics of the phase fluctuations. We interpret the results using methods of condensed-matter physics, based on an effective description of the optical system. This interpretation sheds light on the phenomena, facilitating the understanding of individual systems and leading to a framework for relating different problems with the same symmetry. In this context, we show that the perturbative excitations of the phase are Nambu-Goldstone bosons of a spontaneously broken U(1) symmetry.
dc.language.iso	eng
dc.relation.ispartof	Physical review, A, Atomic, molecular, and optical physics, 2017, vol. 96, num. 5, p. 053848-1-053848-13
dc.subject	Òptica
dc.subject	Partícules (Física nuclear)
dc.title	Photonic Nambu-Goldstone bosons
dc.type	journal article	es_ES
dc.date.updated	2018-04-16T14:06:03Z
dc.identifier.doi	10.1103/PhysRevA.96.053848
dc.identifier.idgrec	125166
dc.rights.accessRights	open access	es_ES