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H. Frauenfelder, E. M. Henley, Teilchen und Kerne: Die Welt der subatomaren Physik, S. 428
P. A. Tipler, R. A. Llewellyn, Modern Physics, Fifth Edition S. 605
K. Bethge, U. E. Schröder, Elementarteilchen und ihre Wechselwirkungen, S. 10
H. Frauenfelder, E. M. Henley, Teilchen und Kerne: Die Welt der subatomaren Physik, S. 2
3PlanckGL
c
H. Frauenfelder, E. M. Henley, Teilchen und Kerne: Die Welt der subatomaren Physik, S. 2
528~ 10Planck
cE eVG
10-10
1K
K. Bethge, G. Walter, B. Wiedemann, Kernphysik – Eine Einführung, S. 216
H. Frauenfelder, E. M. Henley, Teilchen und Kerne: Die Welt der subatomaren Physik, S. 514
K. Stierstadt, Physik der Materie, S. 9
Quanten - Korrelationen
1 2 1 1 2 2
2 2 21 2 1 1 2 2
,
,
r r r r
r r r r
1 2 1 1 2 2 1,r r r r r
21 12
links rechts
,
Wsk Wsk
Wsk Wsk W kr rr rs
unkorreliert
1
2
3
z. B.
Korrelation der Wskamplitude( kann integrieren ! )
klassische Korrelation
Fermionen Bosonen
1 2 2 1, ,r r r r 1 2 2 1, ,r r r r
3 512 2 2, , ,S 0,1, 2,S
1 1 1 1
1 1
, ,
, 0
r r r r
r r
1 1, 0r r
0, , , , ,ee p n
3 6 53, ,He Li Cr
, , ,Photon W Z
4 87 52, , , ,H He Rb Cr
60 2,C O
Vertauschung
halbzahlig ganzzahlig
Pauli - Prinzip
( Durchdringenerlaubt )
G. Otter, R. Honecker, Atome – Moleküle – Kerne: Band II, Molekül- und Kernphysik, S. 377
P. A. Tipler, R. A. Llewellyn, Modern Physics, Fifth Edition S. 589
Geometric Requirements of Electron Spin. Electrons cannot spin separately from the space of which they are structured and connected. If they spin freely as discrete particles, the connected space would twist itself up; that is, the coordinate lines of space would stretch and wrap around one another. The structure of space would be torn or ripped; or, one part of space must slide past another section of space. This concept is illogical and meaningless. This is why spin is purely a quantum wave property of matter.
Quarks, leptons & gauge fields By Kerson Huang
Rauch et. al.: Z. Physik B 29, 281-284 (1978)
Fermionen Bosonen
!(!r1,!r2) = !!(!r2,!r1) !(!r1,!r2) = +!(!r2,!r1)
S =12,32,52, ... S = 0, 1, 2, 3, ...
!(!r1,!r1) = 0 !(!r1,!r1) != 0
e!, p+, n, µ, ...3He,6 Li,53 Cr
Photon,W±, Z, ...4He,7 Li,52 Cr
Atoms as waves
1 nK
temperature wavelength
1000 K1 K1 mK1 µK
Room temperature 0.15 10-10 m
Dilution fridgeL He
Laser coolingEvaporative cooling
4.5 10-10 m1.5 10-8 m4.5 10-7 m15 µm
mvh
dB=λ
~ atom
ic siz
e
~ light
wavele
ngth
Cornell Ketterle Wieman
Nobelpreis 2001
BEC
Distinguishable T shirts
Non degenerate states for 3 distinguishable T shirts in 3 shelfs
3! permutations
degenerate state for 3 distinguishable T shirts in lowest shelf
Indistinguishable T shirts
Non degenerate states for 3 indistinguishable T shirts in 3 shelfs
degenerate state for 3 indistinguishable T shirts in lowest shelf
Indistinguishibility reduces number of non-degeneratestates and increases weight of degenerate ones by N!
Effect only important if # non-deg. states is comparable or smaller than N!
M quantum states and N particles M!/(M-N)! non-deg. states
If M ~N non deg states ~N! BEC
Phase space density ~1