Roger Penrose, Slavoj Žižek, and Sabine Hossenfelder on Quantum Physics and Philosophy Q&A

Quantum Reality and Observation

• 💡 Sabine Hossenfelder clarified that the mathematics of quantum mechanics does not inherently include an observer, viewing it as an interpretation rather than a mathematical component.
• 🧠 Roger Penrose explained that quantum reality can influence events along the past light cone, but this doesn't violate special relativity because it's not ascertainable information that can be used to send signals.
• 📌 He emphasized that quantum reality is something one can confirm, but not directly ascertain or use to send signals into the past.

Interpretations of Quantum Mechanics

• 🔬 The Everett interpretation (Many-Worlds) was discussed, with Sabine Hossenfelder noting it is mathematically equivalent to the Copenhagen interpretation and doesn't resolve the measurement problem.
• 💬 Roger Penrose humorously suggested that physicists might briefly believe in the Everett interpretation at some point in their careers.

Philosophy's Role in Science

• 🤔 Slavoj Žižek challenged the idea that science simply uncovers the "correct description of the universe," arguing that such a claim is both too narrow and too wide.
• 🔑 He asserted that philosophy is essential for grappling with fundamental questions like "What do you mean by reality?" especially when considering quantum reality.
• ⚠️ Žižek critiqued the concept of a "universal observer" in quantum physics, deeming it "profoundly conceptually wrong" and ontologically flawed.

Describing Natural Sciences

• 🚀 Sabine Hossenfelder explored the possibility of describing natural sciences without mathematics, suggesting systems could be directly simulated by other systems.
• ✨ She noted that while mathematics is currently useful for modeling systems, future advancements might allow for bypassing the mathematical step in scientific description.