Photonic Nambu-Goldstone bosons

Photonic Nambu-Goldstone bosons

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Photonic Nambu-Goldstone bosons

Show simple item record García March, Miguel Ángel Paredes, Angel Zacarés, Mario Michinel, Humberto Ferrando Cogollos, Albert 2018-04-16T14:06:02Z 2018-04-16T14:06:02Z 2017
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.rights.uri info:eu-repo/semantics/openAccess
dc.source 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.subject Òptica
dc.subject Partícules (Física nuclear)
dc.title Photonic Nambu-Goldstone bosons
dc.type info:eu-repo/semantics/article 2018-04-16T14:06:03Z
dc.identifier.idgrec 125166

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