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Superposition of States

  1. Oct 30, 2008 #1
    I think this is a basic question:

    If a state is in a superposition of energy eigen states of the harmonic oscillator, what will a single measurement yield?

    Will it be <H>?
  2. jcsd
  3. Oct 30, 2008 #2
    A measurement of what? I guess you mean an energy measurement. A single measurement would yield one of possible energy eigenvalues. The probability of a single measurement yielding a particular energy eigenvalue is equal to the modulus squared of the coefficient of expansion for that particular eigenstate in the superposition state.
  4. Oct 30, 2008 #3
    Ie. Not the expectation value of the energy.
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