Daily Archives: December 10, 2009

Coherent state and Fock state

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The Fock state (e.g. a single photon) is the most particle-like state; it has a fixed number of particles, and phase is indeterminate.

It should be noted that the notation | \alpha \rangle does not refer to a Fock state. For example, at \alpha = 1, one should not mistake |1 \rangle as a single-photon Fock state — it represents a Poisson distribution of fixed number states with a mean photon number of unity.

— Wikipedia on Coherent state

2009.12.10 Thursday ACHK

Be a miracle

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A single mom who’s working two jobs and still finds time to take her son to practice, that’s a miracle. A teenager who says ‘no’ to drugs and ‘yes’ to an education, that’s a miracle. People want me to do everything for them. What they don’t realize is they have the power. Want see a miracle, son? Be the miracle.

— God, Bruce Almighty

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2009.12.10 Thursday ACHK