Can We Reason About Our Place in the Universe Without Defining "Us" - Which of Occam's Razors Should Wigner Use to Shave His Quantum Friend?

Attend a physics colloquium exploring the intersection of quantum mechanics, consciousness, and cosmology through the lens of algorithmic information theory. Delve into modern cosmological puzzles including Boltzmann's brain paradox and Wigner's friend thought experiment, examining how these early 20th century philosophical problems have gained new scientific relevance. Explore the fundamental challenge of determining consciousness in physical systems and its implications for both ethics and our understanding of the universe's nature. Learn how algorithmic information theory and a universalized approach to Occam's razor might provide solutions to these puzzles without requiring explicit definitions of consciousness or observer counting. Discover insights from Charles H. Bennett, an IBM physicist and information theorist renowned for his contributions to quantum information theory, quantum cryptography, quantum computing, and the thermodynamics of computation, as he discusses the application of quantum information and computational complexity theory to cosmological questions and the emergence of classical structures from quantum foundations.