What Happens When You Measure a Superposition State in Harmonic Oscillators?

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SUMMARY

A measurement of a superposition state in a harmonic oscillator will yield one of the possible energy eigenvalues. The outcome of this measurement is determined by the modulus squared of the coefficient of expansion for the specific eigenstate within the superposition. This indicates that the measurement does not provide the expectation value of the energy, but rather a definitive eigenvalue corresponding to the state being measured.

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  • Understanding of quantum mechanics principles
  • Familiarity with harmonic oscillator models
  • Knowledge of energy eigenstates and superposition
  • Basic grasp of probability theory in quantum contexts
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Students and researchers in quantum mechanics, physicists studying harmonic oscillators, and anyone interested in the principles of quantum measurement and superposition states.

daveyman
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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>?
 
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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.
 
Ie. Not the expectation value of the energy.
 

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