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DTSTAMP:20260416T010846
DTSTART:20131206T113000
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DTEND:20131206T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/339228
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Jack Clayton Sankey\, Physics Department\, McGill University 
DESCRIPTION: Laser-Enhanced Micromechanical SensorsIn the field of optomec
 hanics we have learned to use the forces exerted by laser light to gain a 
 new level of control over a wide variety of mechanical systems. These syst
 ems range in size from kilogram-scale mirrors in gravitational wave detect
 ors to nanomechanical elements in cryogenic environments. In this talk I 
 will discuss how a very modest source of laser light (i.e. a few microwatt
 s) can profoundly affect the motion of a micromechanical 'trampoline' reso
 nator. We are able to laser cool its mechanical motion to a very low tempe
 rature\, and we can generate a nonlinear optomechanical coupling that can 
 be used as a strong optical trap or potentially for quantum nondemolition 
 (QND) readout of the trampoline's phonon number state. Our group is curren
 tly interested in using light as a replacement for traditional elastic mat
 erials in micromechanical force sensors. Since the behavior of light is fu
 ndamentally different from that of atoms in a flexible material\, such dev
 ices should circumvent the limitations of the best existing materials and 
 achieve an unprecedented level of precision. In the ultimate limit\, our h
 ope is to use these light-assisted mechanical devices to sense quantum sup
 erpositions from a variety of competing qubit technologies and faithfully 
 imprint this information upon photons traveling down a standard telecom fi
 ber. Cette conférence s'adresse à tous\, y compris les professeurs\, le
 s chercheurs et les étudiants des trois cycles.Le café est servi à part
 ir de 11h20.
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