The Origin of the Universe and the Arrow of Time
Research Professor of Theoretical Physics
1:17:34·2010·introductory level·Public Colloquium
Connects Boltzmann's statistical definition of entropy to cosmology's deepest puzzle: why the early universe began in an extraordinarily low-entropy gravitational state.
MathematicsPhysicsProbability & Information TheoryRelativity & CosmologyBehavioral & Evolutionary Biologygoogle tech talk
One of the most obvious facts about the universe is that the past is different from the future. We can remember yesterday, but not tomorrow; we can turn an egg into an omelet, but can't turn an omelet into an egg. That's the arrow of time, which is consistent throughout the observable universe. The arrow can be explained by assuming that the very early universe was extremely orderly, and disorder has been increasing ever since. But why did the universe start out so orderly?
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