FQXi's 5th International Conference
If a Tree Falls: The Physics of What Happens and Who Is Listening

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INTRO PANEL: DIRTY SECRETS
  • Anthony Aguirre, Dirty Secrets of Cosmology slides video

  • Matt Leifer, Dirty Secrets of Quantum Mechanics slides video

  • Carlo Rovelli, Dirty Secrets of Quantum Gravity slides

  • Paul Davies, Dirty Secrets of Life slides video

  • Bart Selman, Dirty Secrets of Artificial Intelligence slides

  • David Chalmers, Dirty Secrets of Consciousness slides video



CLOSING SESSION: FACE-OFFS, GAME SHOWS, AND MORE
  • George Musser, conference summary, Nine Questions, From an Observer of Recent Events slides video

  • David Chalmers and Carlo Rovelli, Reverse Debate on Consciousness video

  • Sean Carroll and Alan Guth, The Quantum State of the Universe video

  • Vitaly Vanchurin and Raphael Bousso, Is There Really Stuff Outside of Our Causal Patch? video



QM EXPERIMENTS
  • Keith Schwab, Quantum Physics of Mechanical Devices and Two Questions About Mathematics and Physics slides video

  • Matthew Fisher, Quantum Cognition – Theory and Experiment slides video

  • Panel: Andrew Briggs, Alberto Peruzzo, Raj Patel, Tim Taminiau, with Seth Lloyd



WHAT'S AN EVENT?
  • Charles Bennett, Occam's Razor, Boltzmann's Brain and Wigner's Friend in Equilibrating and Non-Equilibrating Cosmologies slides video

  • Bill Unruh, Effect of Measurement on Location of a Quantum Event slides video

  • Sean Carroll, What Happens Inside the Wavefunction? slides video

  • Panel: Emily Adlam, Claus Kiefer, Mairi Sakellariadou, with Andrew Briggs



WHAT'S THE GAP BETWEEN LIFE AND NON-LIFE?
  • Jim Crutchfield, Thermodynamics of Agency slides video

  • Seth Lloyd, Do Chemical Reactions Possess Free Will? slides video

  • Joshua Deutsch, Are Species Sentient? slides video

  • Panel: Joscha Bach, Paul Davies, Bart Selman, Susanne Still, with Anthony Aguirre



WHAT'S AN OBSERVER?
  • Jim Hartle, The Return of the Observer slides video

  • Susanne Still, Optimal Information Processing as an Observer's Way to Represent Information slides video

  • David Wolpert, Observers as Systems That Exploit Information About the Environment to Stay out of Equilibrium slides video

  • Panel: Alan Guth, Adrian Kent, David Wallace, with Adam Brown



WHAT EXISTS?
  • Raphael Bousso, What Exists and What Happens: The Role of the Observer slides

  • Steve Giddings, What Exists in the Quantum Universe – Observation in Gravitational Systems slides video

  • Jenann Ismael, Why Physics Should Care About the Mind, and How to Think About It Without Worrying About the Hard Problems slides

  • Panel: Andreas Albrecht, Bianca Dittrich, Laura Mersini–Houghton, Don Page, with Carlo Rovelli



CONSCIOUSNESS
  • Giulio Tononi, Consciousness as Integrated Information video

  • Masafumi Oizumi, Measures of Consciousness From the Viewpoint of Information Geometry slides video

  • Max Tegmark, Integrated Information in Brains, Machines and Natural Language slides video

  • Panel: Larissa Albantakis, David Chalmers, Federico Faggin, with George Musser



LIGHTNING TALKS
  • Round 1 slides

    • Lorenzo Maccone
    • Ken Wharton
    • Laurance Doyle
    • Gregor Weihs
    • Natalia Ares
    • Tommaso Bolognesi
    • Vitaly Vanchurin
    • Howard Wiseman
    • Antonio Acín
    • Thomas Durt
    • Peter Byrne
    • Noson Yanofsky

  • Round 2 slides

    • Ken Olum video
    • Adam Brown
    • Eduardo Guendelman video
    • Fred Adams video
    • Daniele Oriti video
    • Garrett Lisi video
    • Francesca Vidotto video
    • Jess Riedel
    • Jonathan Halliwell
    • Ian Durham video
    • Michael Westmoreland video
    • Jeremy Butterfield video