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SUMMARY:Quantum-coherent coupling of light to micromechanical motion
DTSTART:20120608T140000
DTSTAMP:20260511T163231Z
UID:4dc3288bf24f384bccc877a9201b7b2c1f361b87c1fa94e67f64f95e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. E. Verhagen\, Laboratory of Photonics and Quantum Measurem
 ents - EPFL\nco authors: S. Deléglise\, S. Weis\, A. Schliesser\, and T. 
 J. Kippenberg\nOptical laser fields have been widely used to achieve quant
 um control over the motional and internal degrees of freedom of atoms and 
 ions\, molecules and atomic gases. A route to controlling the quantum stat
 es of macroscopic mechanical oscillators in a similar fashion is to exploi
 t the parametric coupling between optical and mechanical degrees of freedo
 m through radiation pressure in suitably engineered optical cavities. If t
 he optomechanical coupling is ‘quantum coherent’\, i.e.\, if the coher
 ent coupling rate exceeds both the optical and the mechanical decoherence 
 rate\, quantum states are transferred from the optical field to the mechan
 ical oscillator and vice versa\, thus allowing control of the mechanical o
 scillator state using the wide range of available quantum optical techniqu
 es. We experimentally demonstrate quantum-coherent coupling between optica
 l photons and a micromechanical oscillator. The optomechanical system is a
  silica toroidal whispering gallery mode microresonator embedded in a He-3
  cryogenic environment. Coupling to the cold photon bath simultaneously co
 ols the mechanical oscillator close to the quantum ground state of motion\
 , with an average occupancy of 1.7±0.1 motional quanta. These results pro
 vide a route towards the realization of efficient quantum interfaces betwe
 en mechanical oscillators and optical fields.
LOCATION:PH L1 503 http://plan.epfl.ch/?&room=phl1503
STATUS:CONFIRMED
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