Asked by Abd
You are doing a Ramsey experiment as described in the lecture:
You prepare a beam of atoms in a state |1⟩, you do a π/2 pulse with a Rabi frequency of Ω0=(2π)⋅500 Hz and a detuning of δ=(2π)⋅3 Hz to the |1⟩→|2⟩ transition. Then there is a free flight for a time T = 0.5 s and a second π/2 pulse with the same Rabi frequency. The excited state |2⟩ has a decay rate of γ=0.5 s−1. At the end you measure the purity of the final state right after the second pulse.
What is the length of the Bloch vector after this experiment?
You prepare a beam of atoms in a state |1⟩, you do a π/2 pulse with a Rabi frequency of Ω0=(2π)⋅500 Hz and a detuning of δ=(2π)⋅3 Hz to the |1⟩→|2⟩ transition. Then there is a free flight for a time T = 0.5 s and a second π/2 pulse with the same Rabi frequency. The excited state |2⟩ has a decay rate of γ=0.5 s−1. At the end you measure the purity of the final state right after the second pulse.
What is the length of the Bloch vector after this experiment?
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