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SUMMARY:Indeterminism and Decoherence in Standard Quantum Theory - Christi
 an Schilling\, ETH Zurich
DTSTART:20091125T141500Z
DTEND:20091125T151500Z
UID:TALK21310@talks.cam.ac.uk
CONTACT:13971
DESCRIPTION:In the first part we will address the question of indetermini
 sm in standard quantum theory with respect to measurement processes. A pri
 ori\, it is not clear whether the outcome of a measurement is determined b
 y the initial quantum state of the measurement device. We disprove determi
 nism in that sense by analyzing a correlated two-particle system in an ini
 tial spin\nsinglet state and a measurement apparatus\, which measures the 
 spin of one of the particles.\n\nThe second part will investigate decohere
 nce in the double slit experiment for a charged particle caused by an irra
 diated (monochromatic) laser wave. By calculating the decoherence paramete
 r it will be shown that the laser wave destroys the interference pattern u
 nder certain conditions\, namely a high laser intensity\, long interaction
  time and a wavelength of the laser in\nthe order of the slit distance. Ou
 r results and further quantum features also emphasize the non absoluteness
  of quantum events.
LOCATION:MR14\, Centre for Mathematical Sciences
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