Wednesday, August 10, 2016

quantum mechanics - What is the largest number of bosons placed in a BEC?


What is the record for the largest number of bosons placed in a Bose-Einstein condensate?


What are the prospects for how high this might get in the future?


EDIT: These guys reported 20 million atoms in 2008. "Large atom number Bose-Einstein Condensate machines". http://www98.griffith.edu.au/dspace/bitstream/handle/10072/21541/33525_1.pdf


EDIT 2: van der Straten's group reported 100-200 million.


http://scitation.aip.org/content/aip/journal/rsi/78/1/10.1063/1.2424439 http://journals.aps.org/pra/abstract/10.1103/PhysRevA.80.043606 http://journals.aps.org/pra/abstract/10.1103/PhysRevA.80.043605



But these guys don't seem to claim the largest BEC, so I wonder if there's larger.


EDIT 3: ~ 1 billion hydrogen atoms back in 2000 by Greytak et al.


http://www.sciencedirect.com/science/article/pii/S0921452699014155


Of course, hydrogen has only 1 nucleon while sodium (used by van der Straten et al.) has 23, so these are quite comparable in terms of mass.




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