By Jerzy Kowalski-Glikman
The purpose of this e-book is to offer graduate scholars an summary of quantum gravity however it additionally covers comparable issues from astrophysics. a few well-written contributions can function an creation into simple conceptual techniques like time in quantum gravity or the emergence of a classical international from quantum cosmology. This makes the quantity appealing to philosophers of technology, too. different issues are black holes, gravitational waves and non-commutative extensions of actual theories.
Proceedings of the XXXV overseas wintry weather university on Theoretical Physics, Held in Polanica, Poland, 2-11 February 1999 (Lecture Notes in Physics)
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Extra info for Towards Quantum Gravity
Quantum-gravity phenomenology 41 of the electromagnetic ﬁeld. It seems reasonable to explore the possibility that already the ﬁrst stage of partial uniﬁcation of gravitation and quantum mechanics might require a new mechanics. A (related) plausible feature of the correct eﬀective low-energy theory of quantum-gravity is (some form of) a novel bound on the measurability of distances. This appears to be an inevitable consequence of relinquishing the idealized methods of measurement analysis that rely on the artifacts of the inﬁnite-mass classical-device limit.
79], but only a small percentage of these studies considered the implications for quantum-gravity scenarios. Among these studies the ones reported in Refs. [8,9] are particularly signiﬁcant for the objectives of these lectures, since they illustrate another completely diﬀerent strategy for quantum-gravity experiments. It is there observed that within the realm of the ordinary 3+1 dimensional spacetime an important consequence of the existence of large extra dimensions would be the presence of a tower of Kaluza-Klein modes associated to the gravitons.
Up to this point I have not yet taken into account the gravitational properties of the devices and in fact the “classical-device limit” encountered above is fully consistent with the laws of ordinary quantum mechanics. From a physical/phenomenological and conceptual viewpoint it is well understood that the formalism of quantum mechanics is only appropriate for the description of the results of measurements performed by classical devices. It is therefore not surprising that the classical-device (inﬁnite-mass) limit turns out to be required in order to match the prediction minδD = 0 of ordinary quantum mechanics.
Towards Quantum Gravity by Jerzy Kowalski-Glikman