Hallie Watts
2022-04-18
We will study the time-evolution of a finite dimensional quantum system. To this end, let us consider a quantum mechanical system with the Hilbert space . We denote by |0⟩ and |1⟩ the standard basis elements and . Let the Hamiltonian of the system in this basis be given by
and assume that for the state of the system is just given by . In the following, we also assume natural units in which .
We expand the state at time t in the basis |0⟩, |1⟩ so:
Problems: Use Schrödinger's equation in order to derive a differential equations for :
(i) Find a solution given the initial conditions.
(ii) What is the probability that the system can be measured in |1⟩ at some time t?
mislifola5vo
Beginner2022-04-19Added 11 answers
Step 1
Step 2
Then the Schrödinger equation tells us:
Although I will say I'm a little confused as to why the Hamiltonian isn't diagonalized in what I'm assuming is the energy basis given this a two level system.
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