1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Quantum mechanics

  1. Dec 16, 2015 #1
    1. The problem statement, all variables and given/known data

    . Show that if upload_2015-12-16_16-58-2.png and upload_2015-12-16_16-58-2.png , then upload_2015-12-16_16-58-2.png is constant in time.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Dec 16, 2015 #2
    No attempt?
  4. Dec 16, 2015 #3
    d<A>/dt=i/h x ([H,A]) + dA/dt
    Therefore if upload_2015-12-16_17-12-9-png.93406.png and dA/dt=0 , then dA/dt=0. Is this it.? :-(

    Attached Files:

  5. Dec 19, 2015 #4


    User Avatar

    Staff: Mentor

    Thread locked for moderation.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook