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DTSTART:20200329T030000
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DTSTART:20191027T020000
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DTSTAMP:20260405T192602Z
UID:5c5c38a48b7b2786632536@ist.ac.at
DTSTART:20191112T110000
DTEND:20191112T120000
DESCRIPTION:Speaker: Nils Johan Engelsen\nhosted by Onur Hosten\nAbstract: 
 Mechanical dissipation plays a key role in the field of quantum optomechan
 ics. Not only does dissipation fundamentally limit the coherence time of m
 echanical quantum states\; it also sets the thermomechanical noise floorli
 miting state-of-the-art force sensing technologies. While significant effo
 rts have been devoted to increase optomechanical coupling rates by working
  with nanoscale mechanical resonators with low effective mass\, mechanical
  dissipation usually increases with decreased size. However\, due to a phe
 nomenon known as dissipation dilution\, high quality factors can be achiev
 ed even at the nanoscale. In this talk\, I will describe techniques which 
 reduce mechanical dissipation and effective mass and how these techniques 
 were exploited to produce the highest quality factors to date at room temp
 erature: 800 million in Si3N4 nanobeams. I will then discuss our efforts t
 o integrate these resonators in optomechanical systems with extremely high
  coupling rates.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Nils Johan Engelsen: Ultracoherent Mechanical Resonators for Quantu
 m Optomechanics
URL:https://talks-calendar.ista.ac.at/events/2292
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