| 单词 | expectation value |
| 释义 | > as lemmasexpectation value expectation value n. chiefly Physics (in quantum mechanics) the expected value of a given operator corresponding to some physical state. ΘΚΠ the world > matter > physics > quantum theory > quantum mechanics > [noun] > expected value of property expectation value1936 1936 Proc. Indian Acad. Sci. 3 329 The number of photons has not definite values. But we can calculate its average or expectation value. 1968 G. Ludwig Wave Mech. i. iv. 49 The expectation value of A must then be calculated. 2008 Nature 19 June 1005/2 Entanglement witnesses are observables whose expectation value can indicate something about the entanglement in a given state. < as lemmas |
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