On Time: Causality and the Quantum Gravity Conflict Jan Zaanen ebook#
Page: 112
Format: pdf / epub / kindle
ISBN: 9780198920779
Publisher: Oxford University Press
This text revolves around a new and unusual view on the most fundamental puzzle of physics. It focusses on the key aspect that makes the role of the time dimension fundamentally different: causality. It deals on the one hand with general relativity, and on the other hand with quantum theory. The implicit and intuitive way by which causality is usually taken for granted is just made explicit and less self-evident, shedding a new light on the gravity-quantum conflict. The case is made that gravity is a necessary condition for a causal universe. But upon turning to the "pure" unitary quantum physics explaining the nature of matter one is dealing with the strictly a-causal time expressed through the thermal quantum field theory machinery. When this a-causal microscopic and causal macroscopic world meet, one encounters the wavefunction collapse, that itself may be rooted in the quantum-gravity conflict.Modern ideas are discussed resting on eigenstate thermalization showing how this may lie eventually at the origin of irreversible thermodynamics, with its famous second law setting also a direction of time. The case is anchored in the sophisticated modern mathematical machinery of both general relativity and quantum physics which is normally barely disseminated beyond the theoretical physics floors.The book is unique in the regard that the consequences of this machinery - Riemannian geometry and Penrose diagrams, thermal quantum fields, quantum non-equilibrium and so forth — are explained in an original, descriptive language conveying the conceptual consequences while avoiding mathematical technicalities.The Physicist Who Bets That Gravity Can't Be Quantized Quantizing gravity causes trouble because gravity is a result of space-time itself. So quantum gravity requires quantum space-time — and that Quantum Gravity : Motivations and Alternatives 1 This would not lead to any conflict with the arguments against semi-classical theories, because, on the fundamental level, there would be only the quantum. Why do quantum mechanics and general relativity conflict with The tension between quantum mechanics and general relativity is a key problem that theoretical physicists grapple with. Causation as Constraints in Causal Set Theory conflicting with the “The causal set approach to quantum gravity”. In: Ap- proaches to quantum gravity: Toward a new understanding of space, time. Libro On Time: Causality and the Quantum Gravity Conflict This text revolves around a new and unusual view on the most fundamental puzzle of physics. It focusses on the key aspect that makes the role of the time On Causality in Classical Physics, Quantum Classical physics, in particular classical mechanics is customarily viewed as a causal theory, while quantum physics, in particular quantum mechanics, is often, On the Emergence of Time in Quantum Gravity Abstract. This chapter discusses the idea that the treatment of time in present-day physical theories, general relativity and quantum theory, might be an a. Beyond Causal Explanation: Einstein's Principle Not The very idea of “causality flowing backwards in time” as with Time in Quantum Mechanics. Springer; Berlin, Germany: 2007. pp. 399 On Time: Causality and the Quantum Gravity Conflict This text revolves around a new and unusual view on the most fundamental puzzle of physics. It focusses on the key aspect that makes the role of the time Clash Between General Relativity and Quantum In general relativity, Einstein envisioned a gently curved spacetime, where time is relative to the perspective of an observer in relation to 63 | Solo: Finding Gravity Within Quantum Mechanics To get in the mood, we've had several podcast episodes on quantum mechanics, but the "emergence of spacetime" aspect has been neglected. So