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1241“…Laboratory measurements using very advanced methods in quantum optics might soon reveal small time shifts of the nucleon mass, the magnetic moment of the nucleon and the fine structure constant, thereby providing not only a breakthrough in the understanding of the unified particle interactions, but also an important cross-link between particle physics and cosmology.…”
Enlace del recurso
Enlace del recurso
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1242
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1243
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1244por Veneziano, GabrieleMaterias: “…General Relativity and Cosmology…”
Publicado 1998
Enlace del recurso
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1245
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1246
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1247
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1248
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1249
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1250
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1251
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1252“…We propose a phenomenological approach to the cosmological constant problem based on generally covariant non-local and acausal modifications of four-dimensional gravity at enormous distances. …”
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1253
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1254“…Within a broad class of inflationary models we critically analyze the way initial quantum fluctuations on a new-physics hypersurface (NPH) affect standard predictions for large-scale cosmological perturbations. We find that these so-called transplanckian effects depend crucially on the definition of the "vacuum state" in particular on which Hamiltonian is minimized on the NPH in order to select such a state. …”
Enlace del recurso
Enlace del recurso
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1255“…The argument makes use of the fact that the cosmological constant results in the symmetry algebra of quantum gravity being quantum deformed, as a consequence when the limit Lambda l^2_{Planck} -> 0 is taken one finds a deformed Poincare invariance. …”
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1256
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1257
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1258
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1259
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1260