0 Members and 1 Guest are viewing this topic.
When light is "slowed down" it is essentially the same process that causes materials to have refractive indicies which imply a slower speed for light. The photons are always travelling at light speed but are continually being absorbed and re-emitted unchanged with a Hisenberg related delay between absosbtion and re-emmission. so in effect they are "new" photons.
I found a very nice description here, even if somewhat old.http://www.physicstoday.org/pt/vol-49/iss-8/vol49no8p11-13.pdfAnd here you have a more concise one.http://guava.physics.uiuc.edu/~nigel/courses/563/Essays_2008/PDF/bian.pdfBut you are correct Steve, the BEC will behave as if all atoms were in the same quantum state. It's very strange ( and cool