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SEQUENCE:0
UID:UW-Physics-Event-3381
DTSTART:20140926T203000Z
DTEND:20140926T213000Z
DTSTAMP:20260419T171824Z
LAST-MODIFIED:20140907T170735Z
LOCATION:Chamberin 
SUMMARY:Hunting for topological dark matter with atomic clocks\, Physi
 cs Department Colloquium\, Andrei Derevianko\, University of Nevada\, 
 Reno
DESCRIPTION:Atomic clocks are arguably the most accurate scientific in
 struments ever build. Modern clocks are astonishing timepieces guarant
 eed  to  keep time within a second over the age of the Universe.  Atta
 ining this accuracy requires that the quantum oscillator be well prote
 cted from environmental noise and perturbations well controlled and ch
 aracterized. This opens intriguing prospects of using clocks to study 
 subtle effects\, and it is natural to ask if such accuracy can be harn
 essed for dark matter searches. <br>
\n<br>
\nThe cosmological applica
 tions of atomic clocks so far have been limited to searches of the uni
 form-in-time drift of fundamental constants. We point out that a trans
 ient in time change of fundamental constants can be induced by dark ma
 tter objects that have large spatial extent\, and are built from light
  non-Standard Model fields. The stability of this type of dark matter 
 can be dictated by the topological reasons. We point out that correlat
 ed networks  of atomic clocks\, such as atomic clocks onboard satellit
 es of the GPS constellation\, can be used as a powerful tool to search
  for the topological defect dark matter. In other words\, one could en
 vision using GPS as a 50\,000 km-aperture  topological dark-matter det
 ector.
URL:https://www.physics.wisc.edu/events/?id=3381
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