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The Second Law and Quantum Physics

The Second Law and Quantum Physics

This video was recorded at MIT World Series: Meeting the Entropy Challenge. In this often droll lecture on a very abstract subject, Charles Bennett explores entropy, "one of my long loves," and how it relates to quantum information. He first reminds his audience that such information is reducible to qubits, a two-state system that can exist in a superposition of states -- such as the polarized photon. Bennett believes that "quantum mechanics helps resolves the paradox or puzzle of the origin of the second law" of thermodynamics—the irreversible increase of entropy. Classical science might invoke chaos dynamics or environmental effects to explain entropy. The quantum way of viewing it involves entanglement. In classical mechanics, when two subsystems in a definite state interact "by some... Show More
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