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ave you ever experienced a phenom-enon called dj vu? An event from the
 

Summary: H
ave you ever experienced a phenom-
enon called déjà vu? An event from the
past appears to be happening again as
clearly as the first time you experienced it. It
is a neurological phenomenon whose roots
are mysterious and unclear. No matter how
complicated the processes in our brains may
be, déjà vu can have analogues in the inani-
mate world. In physics it is called the
Fermi­Pasta­Ulam recurrence. As reported
in Physical Review Letters, Van Simaeys et al.1
have now observed this recurrence phenom-
enoninafibre-opticsexperiment.
Since the advent of computers, physicists
have been using them to model the physical
world. In 1953, the well-known physicist
Enrico Fermi, together with two experts in
mathematics, John Pasta and Stanislaw
Ulam, used one of the earliest digital com-

  

Source: Akhmediev, Nail - Research School of Physical Sciences and Engineering, Australian National University
Australian National University, Research School of Physical Sciences and Engineering, Optical Sciences Group

 

Collections: Engineering; Physics