Show that the operator Se,o = sin e cos o Sx +sin 0 sin o y+cos e Sz, (1.84) which represents the spin operator for the component of spin along a direction determined by the spherical polar angles 0 and ø, has eigenvalues +, and eigenstates of the form cos(0/2) sin(0/2) eie ) | 1) =(, 14)=( (1.85) sin(0/2) (1.86) - cos(9/2) eiø Convince yourself that these results agree with the Rie- mann sphere representation in Fig. 1.8. Show further that (6 ?). 1 1 0 (1.87) 1

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Show that the operator
= sin e cos o Sx + sin 0 sin o Sy +cos 6 Sz, (1.84)
which represents the spin operator for the component of
spin along a direction determined by the spherical polar
angles 0 and ø, has eigenvalues ± and eigenstates of
the form
cos(0/2)
I↑) = ( sin(@/2) e*
eiø )
(1.85)
sin(8/2)
=(- cos(9/2) e*
(1.86)
Convince yourself that these results agree with the Rie-
mann sphere representation in Fig. 1.8. Show further that
1 0
0 1
(1.87)
14
Transcribed Image Text:Show that the operator = sin e cos o Sx + sin 0 sin o Sy +cos 6 Sz, (1.84) which represents the spin operator for the component of spin along a direction determined by the spherical polar angles 0 and ø, has eigenvalues ± and eigenstates of the form cos(0/2) I↑) = ( sin(@/2) e* eiø ) (1.85) sin(8/2) =(- cos(9/2) e* (1.86) Convince yourself that these results agree with the Rie- mann sphere representation in Fig. 1.8. Show further that 1 0 0 1 (1.87) 14
01
-1
-i
Fig. 1.8 The Riemann sphere represents the
spin states of a spin- particle. The spin
vector S lies on a unit sphere. A line from the
souch pole of the sphere to S cuts the harizon-
tal equitorial planc (shaded) at y = x + iy
where the horizontal plane is considered as
an Argand diagram. The numerical value of
the complex number g is shown for six cases.
namcly S parallel or antiparallci to the x, y
and : axes.
Transcribed Image Text:01 -1 -i Fig. 1.8 The Riemann sphere represents the spin states of a spin- particle. The spin vector S lies on a unit sphere. A line from the souch pole of the sphere to S cuts the harizon- tal equitorial planc (shaded) at y = x + iy where the horizontal plane is considered as an Argand diagram. The numerical value of the complex number g is shown for six cases. namcly S parallel or antiparallci to the x, y and : axes.
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