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SUMMARY:Building a dark matter wind chime - Jake Taylor\, Joint Quantum In
 stitute\, University of Maryland 
DTSTART:20191108T140000Z
DTEND:20191108T150000Z
UID:TALK134359@talks.cam.ac.uk
CONTACT:Lynn Campbell
DESCRIPTION:Galactic and cosmological observations strong suggest the exis
 tence of a substantial amount of non-luminous matter. This dark matter cou
 ld take many forms\; the only strong constraints know at present are its a
 pproximate density (about one hydrogen atom mass per cubic centimeter in o
 ur galaxy) and that it gravitates. Here we consider the observable consequ
 ences of particulate dark matter with no standard model coupling\, i.e.\, 
 particles that only gravitate. We find that modern optomechanical detector
 s\, now entering the ultra-coherent quantum regime in a variety of experim
 ents worldwide\, may be able to directly observe the effects of individual
  dark matter parts as they stream past the Earth. However\, to achieve thi
 s in the laboratory setting requires making substantial strides in the mea
 surement of massive objects\, going well beyond the so-called ‘standard 
 quantum limit’. I discuss how leveraging tools from quantum information 
 science\, such as quantum non-demolition measurement and squeezinng\, can 
 achieve unprecendented sensitivity of massive objects to small impulses. I
  will discuss the scientific and technological path necessary to yield dir
 ect gravitational observation of dark matter in the range of the Planck ma
 ss to gram-scale particles.
LOCATION: Small Lecture Theatre\, Cavendish Laboratory\, J.J. Thomson Aven
 ue
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