Daily Archives: December 4, 2009

Fock space

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The Fock space is an algebraic system used in quantum mechanics to describe quantum states with a variable or unknown number of particles. It is named after V. A. Fock.

Technically, the Fock space is the Hilbert space made from the direct sum of tensor products of single-particle Hilbert spaces:

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— Wikipedia on Fock space

2009.12.04 Friday ACHK

Constraints

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Give me a million dollars and I’ll figure out what to do. But it’s harder than it looks. Constraints give your life shape. Remove them and most people have no idea what to do: look at what happens to those who win lotteries or inherit money.

— How to do what you love, by Paul Graham

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2009.12.04 Friday ACHK