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    Energy conservation low.

    Hello, let us suppose that we have a quantum harmonic oscillator being in the first exciting state. It means that system has some definite energy E_1. Than we change force constant of of the oscillator. As a consequence eigen states and there energy are changed. I think that after this change...
  2. O

    Quantum anharmonic (cubic) oscillator.

    Hello, I tried to consider one-dimensional anharmonic (cubic) oscillator in second quantization formalism. And I found that energy difference between the first excited state and the ground state (as well as energy difference between the second excited stated and the the first one) as...
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