Unformatted text preview: d~n dt =i ¯ h h Ψ( t )  [ ~σ,H ]  Ψ( t ) i (4) and then express the righthandside only in terms of ~ B ( t ) and ~n ( t ). The result is simpliﬁed version of the Bloch equations (the full Bloch equations also contain dissipative terms generated by couplings to the environment). 2. Griﬃths 9.1 3. Griﬃths 9.3 4. Griﬃths 9.20 (a, b, c were done in class in a slightly diﬀerent notation). 1...
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 Spring '10
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 Physics, mechanics, Bloch, slightly different notation, Bloch equations, timedependent magnetic field, arbitrary quantum state

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