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Nima Arkani-Hamed is a Professor in the Department of Physics
at Harvard University. He received his PhD from the University of California
- Berkeley. His research in theoretical physics is driven by attempting
to address the "hierarchy problem" and the "cosmological constant problem."
Together with Savas Dimopoulos and Gia Dvali, he suggested that the extreme
weakness of gravity can be attributed to the existence of large extra
dimensions of space, perhaps as large as 100 microns in size, with the
scale of quantum gravity lowered to the electroweak scale. This opens
up the possibility that quantum gravitational effects can be probed at
accelerators and even in table-top experiments. Most recently, together
with Dimopoulos, he has explored the possibility that the fine-tunings
for the cosmological constant and hierarchy problems find a common explanation
within a huge landscape of possible low-energy worlds that may exist in
string theory, leading to a novel proposal for "split" supersymmetry at
the large hadron collider.
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