Particles and Fields: Classical and Quantum

Abstract

This volume contains some of the contributions to the Conference Particles and Fields: Classical and Quantum, which was held at Jaca (Spain) in September 2006 to honour George Sudarshan on his 75th birthday.Former and current students, associates and friendscame to Jaca to share a few wonderful days with George and his family and to present some contributions of their present work as influenced by George's impressive achievements.This book summarizes those scientific contributions which are presented as a modest homage to the master, collaborator and friend. At the social ceremonies various speakers were able to recall instances of his life-long activity in India, the United States and Europe, adding colourful remarks on the friendly and intense atmosphere which surrounded those collaborations, some of which continued for several decades.This meeting would not have been possible without the financial support of severalinstitutions. We are deeply indebted to Universidad de Zaragoza, Ministerio de Educación y Ciencia de España (CICYT), Departamento de Ciencia, Tecnología y Universidad del Gobierno de Aragón, Universitá di Napoli 'Federico II' and Istituto Nazionale di Fisica Nucleare.Finally, we wouldlike to thank the participants, and particularly George's family, for their contribution to the wonderfulatmosphere achieved during the Conference. We would like also to acknowledge the authors of the papers collected in the present volume, themembers of the Scientific Committee for their guidance and support and the referees for their generous work. M Asorey, J Clemente-Gallardo and G Marmo The Local Organizing Committee George Sudarshan A. Ashtekhar (Pennsylvania State University, USA) L. J. Boya (Universidad de Zaragoza, Spain) I. Cirac (Max Planck Institute, Garching, Germany) G. F. Dell Antonio (Universitá di Roma La Sapienza, Italy) A. Galindo (Universidad Complutense de Madrid, Spain) S. L. Glashow (Boston University, USA) A. M. Gleeson (University of Texas, Austin, USA) C. R. Hagen (Rochester University, NY, USA) J. Klauder (University of Florida, Gainesville, USA) A. Kossakowski (University of Torun, Poland) V.I. Manko (Lebedev Physical Institute, Moscow, Russia) G. Marmo (Universitá Federico II di Napoli e INFN Sezione di Napoli, Italy) N. Mukunda (Indian Institute of Science, Bangalore, India) J. V. Narlikar (Inter-University Centre for Astronomy and Astrophysics, Pune, India) J. Nilsson (University of Goteborg, Sweden) S. Okubo (Rochester University, NY, USA) T. Regge (Politecnico di Torino, Italy) W. Schleich (University of Ulm, Germany) M. Scully (Texas A& M University, USA) S. Weinberg (University of Texas, Austin, USA) M. Asorey (Universidad de Zaragoza, Spain) L. J. Boya (Universidad de Zaragoza, Spain). Co-Chair J. F. Cariñena (Universidad de Zaragoza, Spain) J. Clemente-Gallardo (Universidad de Zaragoza, Spain) F. Falceto (Universidad de Zaragoza, Spain) G. Marmo (Universitá Federico II di Napoli e INFN Sezione di Napoli, Italy) Co-Chair G. Morandi (Universitá di Bologna, Italy) ACHARYA, Raghunath: Arizona State University, USA AGUADO, Miguel M.: Max-Planck-Institut für Quantenoptik, Garching, Germany ASOREY, Manuel: Universidad de Zaragoza, Spain BERETTA, Gian Paolo: Università di Brescia, Italy BHAMATHI, Gopalakrishnan: University of Texas at Austin, USA BOYA, Luis Joaqu\\'in: Universidad de Zaragoza, Spain CARIÑENA, Jos\\é F.: Universidad de Zaragoza, Spain CELEGHINI, Enrico: Università di Firenze & INFN, Italy CHRUSCINSKI, Dariusz: Nicolaus Copernicus University, Torun, Poland CIRILO-LOMBARDO, Diego: Bogoliubov Laboratory of Theoretical Physics (JINR-Dubna), Russia CLEMENTE-GALLARDO, Jesus: BIFI-Universidad de Zaragoza, Spain DE LUCAS, Javier: Universidad de Zaragoza, Spain FALCETO, Fernando: Universidad de Zaragoza, Spain GINOCCHIO, Joseph: Los Alamos National Laboratory, USA GORINI, Vittorio: Universitá' dell' Insubria, Como, Italy INDURAIN, Javier: Universidad de Zaragoza, Spain KLAUDER, John: University of Florida, USA KOSSAKOWSKI, Andrzej: Nicolaus Copernicus University, Torun, Poland MARMO, Giuseppe: Università di Napoli Federico II, Italy MORANDI, Giuseppe: Universitá di Bologna-Italy MUKUNDA, Narasimhaiengar: Indian Institute of Science, Bangalore, India MUÑOZ-CASTAÑEDA, Jose M.: University of Zaragoza, Spain NAIR, RANJIT: Centre for Philosophy & Foundations of Science, New Delhi, India NILSSON, Jan S: University of Gothenburg, Sweden OKUBO, Susumu: University of Rochester, USA PASCAZIO, Saverio: Universitá di Bari, Italy RIVERA HERNÁNDEZ, Rayito: Université Pierre et Marie Curie, Paris, France RODRIGUEZ, Cesar: University of Texas - Austin, USA SCOLARICI, Giuseppe: Universitá del Salento, Lecce, Italy SEGUI, Antonio: Universidad de Zaragoza, Spain SHAPIRO, Ilya: Universidade Federal de Juiz de Fora, Brasil SIMONI, Alberto: Università di Napoli Federico II, Italy SOLOMON, Allan: Open University/ University of Paris VI, UK/France SUDARSHAN, Ashok: SUDARSHAN, George: University of Texas at Austin, USA TULCZYJEW, Wlodzimierz: Universitá di Camerino, Italy UCHIYAMA, Chikako: University of Yamanashi, Japan VENTRIGLIA, Franco: Università di Napoli Federico II, Italy VILASI, Gaetano: Universitá di Salerno, Italy ZACCARIA, Francesco: Universitá di Napoli Federico II, Italy