Andris Ambainis was supposed to spend the fall at MSRI in Berkeley but
instead is enjoying his native Latvia. When Manindra Agrawal came to
Boston last month to talk about his primality algorithm, he was
supposed to bring along his student co-authors. Instead he came
alone.
Worries about terrorism have caused the US government have made them
more cautious about issuing visas and this has slowed down the visa
process tremendously. Visa problems have always been a thorn for
academics but this fall seems particularly bad.
I understand the need to be careful but when science is hindered by
politics nobody is a winner.