Quantum Mechanics
Posted: Thu Feb 09, 2006 8:10 am
While dealing with quantum mechanics,the thought experiments of the variations of the Young's Double Slit experiment are what really makes one think...
1.Lasing action...What is the nature of the temporal connectedness of the photons or electrons?In the case of photons,where usually a laser is used,two photons are released after an activation by a single photon,of the atomic system.The electron beam for these experiments are usually generated in a similar way,by exciting a chemical into releasing the electrons simultaneously while it gets back to its 'ground state'.As the atoms/molecules release the photons from the same energy level,does this mean that each energy level is related to a single unit of time 'inside' the unit space,as we are dealing with the atomic interiors?
2.In the Young's double slit experiment with electron beam,the presence of a detector,which flashes the photons and records their scattering in order to detect the electron,is said to 'collapse' the wave function.Does this mean that the photon just pushes the electrons a bit 'apart' in time,and this results in a complete loss of coherency?
3.As we increase the wavelength of the photon used for measuring the electron's presence,once it becomes greater than the slit width,the interference pattern is supposed to reappear on the screen,EVEN THOUGH the electrons are still being measured by the photons.Any guesses as to what is happening?
Reference:Feynman lectures,vol.3.
Gopi
1.Lasing action...What is the nature of the temporal connectedness of the photons or electrons?In the case of photons,where usually a laser is used,two photons are released after an activation by a single photon,of the atomic system.The electron beam for these experiments are usually generated in a similar way,by exciting a chemical into releasing the electrons simultaneously while it gets back to its 'ground state'.As the atoms/molecules release the photons from the same energy level,does this mean that each energy level is related to a single unit of time 'inside' the unit space,as we are dealing with the atomic interiors?
2.In the Young's double slit experiment with electron beam,the presence of a detector,which flashes the photons and records their scattering in order to detect the electron,is said to 'collapse' the wave function.Does this mean that the photon just pushes the electrons a bit 'apart' in time,and this results in a complete loss of coherency?
3.As we increase the wavelength of the photon used for measuring the electron's presence,once it becomes greater than the slit width,the interference pattern is supposed to reappear on the screen,EVEN THOUGH the electrons are still being measured by the photons.Any guesses as to what is happening?
Reference:Feynman lectures,vol.3.
Gopi