Final preview

the three principles of quantum mechanics. page 101.

• First principle: superposition
  • with each physical system there is an associated Hilbert space E_H
  • at each time t, the state of the system is completely determined by a normalized vector $|\psi(t) \rangle$

• Second principle: measurement
  • with each physical quantity $A \$ one can associate a linear hermitian operator $\hat{A} \$