Quantum physics (quantum theory, quantum mechanics)
Quantum physics (quantum theory, quantum mechanics) Quantum physics (quantum theory, quantum mechanics)
Results on matter wave interference Neutrons, A Zeilinger et al. Reviews of Modern Physics 60 1067-1073 (1988) C 60 molecules: M Arndt et al. Nature 401, 680-682 (1999) With multipleslit grating Without grating He atoms: O Carnal and J Mlynek Physical Review Letters 66 2689- 2692 (1991) Fringe visibility decreases as molecules are heated. L. Hackermüller et al. , Nature 427 711-714 (2004) Interference patterns can not be explained classically - clear demonstration of matter waves 30
Which slit? Try to determine which slit the electron went through. Shine light on the double slit and observe with a microscope. After the electron passes through one of the slits, light bounces off it; observing the reflected light, we determine which slit the electron went through. Need ph < d to distinguish the slits. photon momentum electron momentum : Diffraction is significant only when the aperture is ~ the wavelength of the wave. momentum of the photons used to determine which slit the electron went through > momentum of the electron itself changes the direction of the electron! The attempt to identify which slit the electron passes through changes the diffraction pattern! 31
- Page 1 and 2: Quantum physics (quantum theory, qu
- Page 3 and 4: Homework from 2 nd lecture Calcula
- Page 5 and 6: QUANTUM MECHANICS new kind of physi
- Page 7 and 8: Uncertainty principle • Uncertain
- Page 9 and 10: Quantum Mechanics of the Hydrogen A
- Page 11 and 12: Multi-electron Atoms Similar quantu
- Page 13 and 14: Photon properties Relativistic rel
- Page 15 and 16: Compton (1923) measured intensity o
- Page 17 and 18: Before Incoming photon p Compton s
- Page 19 and 20: WAVE-PARTICLE DUALITY OF LIGHT Ein
- Page 21 and 22: Fringe spacing in double slit exper
- Page 23 and 24: Double slit experiment: low intensi
- Page 25 and 26: Double slit experiment - QM interpr
- Page 27 and 28: double slit expt., wave function
- Page 29: Electron Double-Slit Experiment C.
- Page 33 and 34: Wave - particle - duality So, ever
- Page 35 and 36: The Copenhagen Interpretation Bohr
- Page 37 and 38: Splitting of atomic energy levels B
- Page 39 and 40: Stern-Gerlach experiment (1921) Ove
- Page 41 and 42: The concept of spin Stern-Gerlach
- Page 43 and 44: Problems: Homework set 3 HW3.1: te
Results on matter wave interference<br />
Neutrons, A Zeilinger<br />
et al. Reviews of<br />
Modern Physics 60<br />
1067-1073 (1988)<br />
C 60 molecules: M<br />
Arndt et al. Nature<br />
401, 680-682<br />
(1999)<br />
With multipleslit<br />
grating<br />
Without grating<br />
He atoms: O Carnal and J Mlynek<br />
Physical Review Letters 66 2689-<br />
2692 (1991)<br />
Fringe<br />
visibility<br />
decreases as<br />
molecules are<br />
heated. L.<br />
Hackermüller<br />
et al. , Nature<br />
427 711-714<br />
(2004)<br />
Interference patterns can not be explained classically - clear demonstration of matter waves<br />
30
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