Robinson's Podcast 236 - David Albert: A Masterclass on Time’s Arrow
Dec 2, 2024
David Albert, a distinguished Philosophy Professor at Columbia University, dives into the conundrum of time’s arrow. He explores the tension between past and future in both physics and everyday life. Discover insights on entropy and thermodynamics that underline why we remember the past but not the future. David unravels the complexities of time asymmetry, discussing how the laws of quantum physics challenge our understanding and perceptions. This enlightening conversation blends philosophy and science, prompting listeners to rethink their relationship with time.
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Three Arrows of Time
- Everyday time-directedness falls into three categories: physical processes, epistemic access, and influence.
- Examples include paper burning, remembering the past, and affecting the future, all exhibiting time asymmetry.
Entropy and Time's Direction
- The second law of thermodynamics, stating entropy never decreases, explains time-directed physical processes.
- This single law accounts for phenomena like paper burning, ice melting, and smoke dispersing, unifying various time asymmetries.
Boltzmann's Statistical Mechanics
- Boltzmann linked macro-states (e.g., melting ice) to numerous micro-states (particle positions/velocities).
- He argued most micro-states lead to increased entropy, but time-reversal symmetry posed a challenge, implying the past should also have higher entropy.
