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April 13th, 2017, 07:37 AM  #1 
Senior Member Joined: Apr 2014 From: Glasgow Posts: 2,156 Thanks: 731 Math Focus: Physics, mathematical modelling, numerical and computational solutions  BoseEinstein condensate with negative effective mass! 
April 13th, 2017, 08:09 AM  #2 
Senior Member Joined: Jun 2015 From: England Posts: 915 Thanks: 271 
I've come across negative effective mass in relation to the Hall effect. This is well documented. Effective mass usually refers to the inertial mass which may act differently from the gravitational mass in appropriate circumstances It is one of the wonders of Nature that in normal (ie most) circumstances the gravitational mass and the inertial mass are the same. 

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boseeinstein, condensate, effective, mass, negative 
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