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Date: Mon, 27 Aug 2001 11:24:09 -0300 From: Ivanilda Gomes Ferreira <iva@cbpf.br> Subject: CLUBE DA SEXTA FEIRA CLUBE DA SEXTA FEIRA O proximo encontro do clube em teorias dos campos "Formerly Known as Friday Club",será realizado no dia 29 de agosto, conforme abaixo: Seminario do Clube Palestrante: Prof. Bert Schroer Titulo: Lightfront Physics versus Holography&Chiral Scanning Dia: 29 de agosto Horario: 14 horas Local: Auditorio do quinto andar. Resumo: The limitations of the approach based on using fields restricted to the lightfront (Lightfront quantization (or p-->infinity frame approach) which drive quantum fields towards free fields are well known. Here we propose a new concept which does not suffer from this limitation. It is based on a procedure which cannot be directly formulated in terms of pointlike fields but requires ``holographic'' manipulations of the algebras generated by those fields. We illustrate the new concepts in the setting of factorizable d=1+1 models and show that the known fact of absence of ultraviolet problems in those models (in the presence of higher than canonical dimensions) also passes to their holographic images. In higher spacetime dimensions d>1+1 the holographic image lacks the transversal localizability; however this can be achieved by doing holography on d-2 additional lightfronts which share one lightray (Scanning by d-2 chiral conformal theories).
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