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News Article http://www.livescience.com/25959-atoms-colder-than-absolute-zero.html
Original Paper http://arxiv.org/abs/1211.0545
Systems with a positive temperature will increase in entropy as one adds energy to the system.
Systems with a negative temperature will decrease in entropy as one adds energy to the system.
http://en.wikipedia.org/wiki/Negative_temperature
Negative temperatures are only possible under specially controlled lab conditions.
Under these conditions, high-energy states become more occupied than low-energy states.
The Schneider et al. team accomplished this using magnetic fields and a laser lattice.
Is twis dead? I consume twis only through podcast and the last episode was 3 of Jan.
Sorry, that last post was a bit harsh. I love the podcast and would like to follow it weekly. Please upload/update the podcast so that i can ‘get me some more twis goodness’.
It is not dead, just very far behind in updating. My sincerest apologies for the (massive) delay.
Yup! working on it…
There’s a team of busy procrastinators working on getting them out.