Upload
duongnhan
View
217
Download
0
Embed Size (px)
Citation preview
Keausur ohwe Hiefsumthel ? 14.
6.
17
Wiederholnwg-
QM in 3 D : px → § = - it }
I →E
= it Bpkeewoh
. Vertausdunugsoeeahiouen :
[ Ii, pj ] = it Sij
Drewiuepues - Operator E :
Ii = Ee Eike Tepe hermihesoh
[ Ii ,it ] =o = [ Ii
, f2][ it
,[ i ] = 0
, falls fin kugeesymm .
System
⇒ e) Drehiunpues - Evwavtuugewert ist eiue
Erhaltuwgsgrofse
a) II & Ie. hasen geiueiusaime EigeubasisD
.
h. Eigewwerte der Kowepouente Li
des Dnehiwpuls operators siud
"
gate Qnamtenzaheen'
Eigeufuukhioneu des Drehiunpues - Operatorskeass .
: Drehicmpels duck 3 Kocmpoueuknfestgeeege
[ Ex,Lj ] = [ gpz- Epj,Epix -kp← ]
= [ 5pz ,I'p× ] - [ ijpz
,
× Pz ]
- [ Epj,
Epi, ] + EEFY,
ripe ]
= jpx [ pz ,z ] - 0 - 0 + ipy [ z
,P← ]
=it it
= it ( Epj - ye p× ) = it Iz
allgemeine : [ Ii,
Ij ] = it E Eijne Lie
Die Kourpoueuteu desDrehiuepulseskowweuwide miuenetah aletenun'
-
wiert seen
⇒ que . Daehiurpuls heat keiwe
definite ( = schwauknwgstcibesticnmbane ) Ridetuug
Betray ?
[ it, E]=o,
weie [II ,I;] = o
[ E,Ii ] = o ? ✓
[ [2,[;] = E [ II, I ;]
= Eu ( LI Li - Li Lie )
=
Eu ( La Lie Li - Li Lie Lie )
= 22 ( La La Li - La Lila +
Yile- Li Lie Lie + Lieli Lie - # Lie
= E Lie I ↳,
Li ]
+[ La
,Li ] Lk
=ituEeLk Ekie Le+ Erie Lelk
= ite Ee Lk Le (Ekiet
Eeiz ) =0
if
⇒ [ II,
in ]⇒,[ it
, Li ]=o ,[ L
'
, Li]=o
⇒ es gist simnetaue Eigenfuukhoueuzu E
,I £ ,
it
£ Oden Rx Oder Ly
⇒ win suoheu dahen : Eigenwertzu E
-12 Il
,m > = to l ( ete ) Il ,m >
[z Ie
,in > = him I e.
Eigenwef Znlz
Leitenopenahreu fin Lz :-
[±=I×±iL[|
Keuunutahreigeuschafkn :
[ Lz , L± ] = [ Lz , L×] ± i [ Lz, Lg ]
= it Ly ± i fit ) ↳
= tlihy ± Lx )
± ±£ ( ↳ ± ily ) = ±tL±
[ E,
L± ] =o
Sci Il m > Eigen Zustand zu 22,
Lz
⇒ [2 L± le, in > = Lt 4 'll
,in >
= tee ( lte ) L±1l,
in )
⇒ L± ll,
m > ist Eigenzustand 2- E unit
Eisenhart ttlcetr )
Lz 1- ± Il ,m > = (±to L± + L± Lz ) Il,
on >
= L± ( ± t + him ) le,
on >
= E ( in ± ^ ) Li Il,
in >
⇒ L± Il,
in > ist Eigeuzustand zu Lz unit
Eigeuwert k(m± e)
Abbhedekniterieue :
( emllil em > = tee ( lie )= ( lml LI lem > + < emlljllm ) + ( luxkztbi
= ( Lxlml Lxlud + ( ↳ lmllylm ) + tewi- -
20 20
⇒ htecete ) 2 time @
⇒ fin fates l uunssgelteu :
[+Il
, mwax ) = 0
a
betradle : L± L= = ( Lx ± ily ) ( ↳
Iily )2
= LI + Ly Fi ↳ Ly ±iLgL×
= LE + Ljh Ii ( it Lz )
= LI + Lj ± tulz
= E - L2z ± trlz
⇒ till ,mma×$ = Eilllti ) Il, mmax )