Committees
ICRAnet and ICRA 2^nd Stueckelberg Workshop on Relativistic Field Theories September 3-7, 2007 - Pescara, Italy Program Life Schedule Scientific organizing committee Participants Conference Registration
XXIV · Pescara · September 3-8, 2007
2nd Stueckelberg Workshop on Relativistic Field Theories
This page presents the usable scientific material migrated from the legacy ICRA Networkshops archive. Obsolete navigation frames, broken server responses, old registration forms, and dated travel logistics are omitted from the modern view.
given to Prof
given to Prof. Ruffini by Prof. Stueckelberg in 1971 at Cern Main lecturer: prof. Thomas Thiemann Other lecturers: G. Amelino-Camelia, T. Damour, G. Montani, G. Vereshchagin, R. Zalaletdinov and members of the CGM group.
Scientific Program
Monday, September 3, 2007 chiar-person: R. Zalaletdinov 9.30-9.45 Opening remarks 9.45-10.30. T. Thiemann lecture on the quantization scheme in Loop Quantum Gravity 10.30-10.35 Break for questions 10.35-11.15 T. Thiemann lecture on the quantization scheme in Loop Quantum Gravity 11.15-11.30 Coffee break 11.30-12.30 T. Damour "Effective One Body approach to coalescing binary black holes" 12.30-13.15 G. Montani "Sincrhonous Quantum Gravity: Early Universe dynamics" 13.15-14.45 Lunch 14.45-15.15 F.Cianfrani-O.M. Lecian "Stuckelberg: a forerunner of modern physics II" 15.15-15.45 F. Cianfrani "The role of the time gauge in the 2nd order formalism" 15.45-16.15 G.V. Vereshchagin "Semi-classical Loop Quantum Cosmology" 16.15-16.30 Coffee Break 16.30-17.15 E. Magliaro. C. Perini "Comparing loop quantum gravity with the linearized theory" 17.15-17.30 E. Alesci "The full graviton propagator from loop quantum gravity" 17.30-18.00 discussion on Loop Quantum Gravity Tuesday, September 4, 2007 chair-person: S.S. Xue 9.30-10.15 T. Thiemann lecture on problems and prospectives in Loop Quantum Gravity 10.15-10.20 Break for questions 10.20-11.00 T. Thiemann lecture on problems and prospectives in Loop Quantum Gravity 11.00-11.15 Coffee break 11.15-12.15 T. Damour "Chaos and symmetry in string cosmology" 12.15-13.00 G. Vereshchagin "Thermalization of the pair plasma" 12.45-14.30 Lunch 14.30-15.00 N. Carlevaro "Lorentz Gauge Theory and spinor interaction" 15.00-15.30 K. Giesel "Dirac observables" 15.30-15.45 Coffee break 15.45-16.15 O. M. Lecian "Exponential Lagrangian for the gravitational field and the problem of vacuum energy" 16.15-17.00 R. Zalaletdinov "Macroscopic Gravity and Averaging Problem in Cosmology" 17.00-17.30 S.S. Xue "The gravitational origin of fermion masses" 17.30-18.00 discussion on problems and perspectives in Loop Quantum Gravity. Comparison with string-theoretical approaches 18.00-18.15 C. Sigismondi "Meteotsunami detection in Adriatic and Tyrrenian sea" Wednesday, September 5, 2007 chair-person: R. Benini 9.30-10.15 T. Thiemann lecture on main issues in Loop Quantum Cosmology 10.15-10.20 Break for questions 10.20-11.00 T. Thiemann ...
Abstracts
Ernst Carl Gerlach Stueckelberg (February 1, 1905, Basel - September 4, 1984, Basel) was a Swiss mathematician and physicist. In 1926 Stueckelberg got his Ph.D. at Munich under Arnold Sommerfeld. He qualified as a university lecturer together with Konrad Bleuler under supervison from Gregor Wentzel at the University of Zrich. Stueckelberg became then Assistant Professor at Princeton University. In 1934 he devised a fully covariant perturbation theory for quantum fields. To quote a paper of Lacki et al., "The approach proposed by Stueckelberg was far more powerful, but was not adopted by others at the time". It still has not been. However, besides being explicitly covariant, Stueckelberg's methods avoid vacuum bubbles. Independently from Hideki Yukawa, and arguably before him, he gave vector boson exchange as the theoretical explanation of the strong nuclear force in 1935. The evolution parameter theory he presented in 1941 and 1942 is the basis for recent work in Relativistic dynamics. In 1942 he proposed the interpretation of the positron as a negative energy electron traveling backward in time.This result was quoted by Feynmamnn in the abstract of his classic paper "The theory of Positrons", [Phys. Rev. 76, 749-759 (1949)]. In 1943 he came up with a renormalization program to attack the problems of infinities in quantum electrodynamics (QED), but his paper was rejected by the Physical Review. In 1976 he was awarded the Max Planck medal.
Collected Material 5
Dr. F. Cianfrani^ co ICRAnet, Pescara, Italy Dr. G. Montani^ co ICRAnet, Pescara, Italy Prof. Remo Ruffini ICRAnet, ICRA (International Center for Relativistic Astrophysics) and Rome University "La Sapienza"
Abstracts
_E. Alesci Title:"The full graviton propagator from loop quantum gravity" Author: E. Alesci Abstract: Some components of the graviton two-point function have been recently computed in the context of loop quantum gravity, using the spinfoam Barrett-Crane vertex. We complete the calculation of the remaining components. We find that, under our assumptions, the Barrett-Crane vertex does not yield the correct long distance limit. Here we show that a vertex amplitude that depends nontrivially on the intertwiners can yield the correct limit. We give an explicit example of asymptotic behavior of a vertex amplitude that in fact gives the full correct graviton propagator in the large distance limit. _G. Amelino-Camelia Title: "Quantum Gravity Phenomenology and a generalization of the Noether theorem for quantum spacetime" Author: G. Amellino-Camelia Abstract: In devising a phenomenology for quantum-gravity theories additional difficulties are introduced by grey areas in our identification of observable consequences of a given theory. This has been particularly true for the study of Planck-scale modifications of spacetime symmetries, but for this I intend to argue that a recently-obtained generalization of the Noether theorem should provide a very valuable new tool. _M. V. Battisti Title: "Minisuperspace dynamics in the GUP framework" Authors: M. V. Battisti, G. Montani Abstract: The implications of a generalized uncertainty principle are investigated in the minisuperspace context. In particular, the FRW and the Taub cosmological models are quantized by means of a modified Heisenberg algebra. Suitable wave packets are built and their motion investigated. As result of the analysis, in both the cases, the classical singularity appears to be probabilistic suppressed. Furthermore the GUP wave packets, in the Taub model, provide the right behavior in predicting an isotropic Universe. Title: "Cosmological implication of evolutionary Quantum Gravity" Authors: M. V. Battisti, G. Montani Abstract: We consider a Schr\"odinger quantum dynamics for the gravitational field associated to a generic cosmological model and then ...