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April 14, 2005
Note from Man-Hong on "Energy-time Uncertainty relation"
Hey Everyone,
Man-Hong sends this comment our way:
I accidentially found a comment by Seth Lloyd, in his nature article "Ultimate physical limits to computation". It is said that
"In particular, the correct interpretation of the time-energy Heisenberg uncertainty principle [DE Dt >= hbar] is not that it takes time Dt to measure energy to an accuracy DE (a fallacy that was put to rest by Aharonov and Bohm) but rather that that a quantum state with spread in energy DE takes time at least [Dt = pi hbar / 2 DE] to evolve to an orthogonal (and hence distinguishable) state."
Brian
Posted by Brian at April 14, 2005 08:45 AM
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