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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3381
DTSTART:20140926T203000Z
DTEND:20140926T213000Z
DTSTAMP:20240319T031141Z
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.
\n
\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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