Talk:Bloch equations

Clockwise vs. Counterclockwise

Thus the transverse magnetization, M_xy, rotates around the z axis with angular frequency ω₀ $=$ γB₀ in counterclockwise direction (this due to the negative sign in the exponent).

Actually, M_xy rotates in clockwise direction:

$e^{-i\varphi }=\cos \varphi -\sin \varphi$

When $\varphi$ grows, the apex of the M_xy moves down and to the left -- clockwise.

Moreover, I think that writing $\omega _{0}=-\gamma B_{0}$ would be somewhat better because it is easier to draw the parallel with the notion of Larmor frequency in this way.

I will only change "counterclockwise" to "clockwise" and wait for comments on the negative circular frequency idea.

Scolobb (talk) 19:14, 12 August 2010 (UTC)[reply]

bloch-equation quantum theory

the block-equation, or rather a bloch-action that induces the (plain) bloch equation, also arises in quantum field theory, when constructing a feynman path integral (euklidean) for spin degrees of freedom [condensed matter field theory, altland/simons, 3.3.5]. this might be interesting fact to add. 217.93.151.103 (talk) 13:50, 4 May 2011 (UTC)[reply]

Bz and the change of Mz

According to the equation, Bz does not directly affect the change of Mz, this is very weird. Jackzhp (talk) 17:18, 9 November 2013 (UTC)[reply]

Sign error in matrix for Bloch equations in the rotating frame

I believe there is a sign error in the rotating frame formulation of the Bloch equations in "matrix-vector notation". Due to symmetry, I think the $a_{31}$ -element of the 3×3 matrix (or possibly $a_{13}$ ) should be $+\epsilon$ . Bocercus (talk) 21:08, 12 December 2024 (UTC)[reply]