Título del libro: Approaches To Quantum Gravity: Toward A New Understanding Of Space, Time And Matter
Título del capítulo: Lorentz invariance violation and its role in Quantum Gravity phenomenology
DANIEL EDUARDO SUDARSKY SAIONZ;
Autores externos:
Idioma:
Inglés
Año de publicación:
2009
Resumen:
Introduction Although there is enormous uncertainty about the nature of Quantum Gravity (QG), one thing is quite certain: the commonly used ideas of space and time should break down at or before the Planck length is reached. For example, elementary scattering processes with a Planck-sized center-of-mass energy create large enough quantum fluctuations in the gravitational field that space-time can no longer be treated as a classical continuum. It is then natural to question the exactness of the Lorentz invariance (LI) that is pervasive in all more macroscopic theories. Exact LI requires that an object can be arbitrarily boosted. Since the corresponding Lorentz contractions involve arbitrarily small distances, there is an obvious tension with the expected breakdown of classical space-time at the Planck length. Indeed, quite general arguments are made that lead to violations of LI within the two most popular approaches towards QG: string theory and loop quantum gravity This has given added impetus to the established line of research dedicated to the investigation of ways in which fundamental symmetries, like LI or CPT, could be broken. It was realized that extremely precise tests could be made with a sensitivity appropriate to certain order of magnitude estimates of violations of LI. © Cambridge University Press 2009.
Entidades citadas de la UNAM:
ISBN:
9780511575549
Editorial:
Cambridge University Press Nombre de la publicación:
Lorentz invariance violation and its role in Quantum Gravity phenomenology
Página inicial:
528
Página final:
547
