Exploring the Mysteries of Time: Insights from Professors Miguel Á. Vázquez-Mozo and Carlo Rovelli
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The concept of time has always fascinated and puzzled me (and humanity). In a recent video, Kurzgesagt delved into this complex topic, guided by insights from Professors Miguel Á. Vázquez-Mozo of the University of Salamanca and Carlo Rovelli of Aix-Marseille University. The video presents two prominent theories that attempt to explain time: the "block universe" theory and the "growing block" theory.
Originating from Einstein's theory of special relativity, the block universe theory, also known as "eternalism" in philosophical circles, suggests that past, present, and future all exist simultaneously. Contrary to our everyday experiences, this theory implies that time doesn't flow; rather, every moment is equally real. This notion is reminiscent of the timeless existence of the universe, as the block universe theory suggests.
Philosopher and mathematician Hilary Putnam's article "Time and Physical Geometry" in the Journal of Philosophy (Vol. 64, 1967) and theoretical physicist Paul Davies' article "That Mysterious Flow" in Scientific American (Vol. 287, 2002) offer comprehensive discussions on this concept.
Proposed by cosmologist George Ellis, the "growing block" theory is a nuanced version of the block universe. It posits that while the past exists, the future is yet to be formed. This theory acknowledges the irreversible nature of macro-physical behavior and the development of complex systems, including life. Ellis' works, such as "Physics in the Real Universe: Time and Spacetime" (General Relativity and Gravitation, Vol. 38, 2006), provide a detailed exploration of this idea.
Ellis, along with collaborators Rothman and Goswami, further expands on this concept in several publications, including "Time and Spacetime: The Crystallizing Block Universe" (International Journal of Theoretical Physics, Vol. 49, 2010) and "Space time and the passage of time" (2012). These works discuss how quantum effects, such as uncertainty and entanglement, play a significant role in the transformation of the indefinite future into a definite past.