Recent content by agooddog

  1. A

    How Long Until a Two-Particle Quantum System Reverts to Its Initial State?

    Homework Statement This is a quick one, which I apologize ahead of time for not writing this out more neatly. The parentheses denote subscripts. I have a system of two particles, which are in a superposition Psi(one) + Psi(two). The energy of particle one is E(1) and of particle two is...
  2. A

    How Does the General Uncertainty Principle Apply to Non-Commuting Operators?

    Gut instinct tells me it will be ( 0 1 ) (transposed, of course) Ah, I did not notice that these represent spins, but merely saw them as (somewhat) arbitrary operators that the Prof made up. I feel a little dumb now realizing how similar they are to the Pauli spin matrices. Although I am...
  3. A

    How Does the General Uncertainty Principle Apply to Non-Commuting Operators?

    Homework Statement http://img219.imageshack.us/img219/306/prblem.png (oops, that line should end with "just before measurement? (Express your answer in terms of the variances of the two operators)" ) The Attempt at a Solution...