Effects of geometry on quantum fluctuations ofphonon-trapping acoustic cavities几何结构对量子涨落地影响 声子俘获声学腔.pdf

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1、PAPER•OPENACCESSRelatedcontent-High-QmicromechanicalresonatorsforEffectsofgeometryonquantumfluctuationsofmasssensingindissipativemediaKirsiTappura,PanuPekkoandHeikkiphonon-trappingacousticcavitiesSeppä-TopicalReviewSTadigadapaandKMatetiTocitethisarticle:MaximGorya

2、chevandMichaelETobar2014NewJ.Phys.16083007-OptomechanicalcrystalnanobeamcavitywithhighoptomechanicalcouplingrateYongzhuoLi,KaiyuCui,XueFengetal.Viewthearticleonlineforupdatesandenhancements.Recentcitations-FlickerNoiseinQuartzCrystalResonatorat353KasaFunctionofQ-F

3、actorofOvertonesandAnharmonicModesat4KA.Pokhareletal-AcousticTestsofLorentzSymmetryUsingQuartzOscillatorsAnthonyLoetal-FaridYa.KhaliliandStefanL.DanilishinThiscontentwasdownloadedfromIPaddress117.165.38.202on17/08/2018at16:04Effectsofgeometryonquantumfluctuationsof

4、phonon-trappingacousticcavitiesMaximGoryachevandMichaelETobarARCCentreofExcellenceforEngineeredQuantumSystems,UniversityofWesternAustralia,35StirlingHighway,CrawleyWA6009,AustraliaE-mail:maxim.goryachev@uwa.edu.auandmichael.tobar@uwa.edu.auReceived4April2014,revis

5、ed17June2014Acceptedforpublication24June2014Published4August2014NewJournalofPhysics16(2014)083007doi:10.1088/1367-2630/16/8/083007AbstractThisworkpresentssomepeculiaritiesofthenearquantumgroundstatebeha-viourofcurved(phonontrapping)bulkacousticwave(BAW)cavitieswhe

6、ncomparedtoaconventionalmechanicalresonator.ThecurvedcavitysystemresolvesthequandaryoftheconventionalmechanicalsystemwheretheBose–Einsteindistributionrequireshigherfrequenciesforlowerquantumoccupationfactorscontrarytotheconstraintofaninversefrequencydependenceofth

7、equantumfluctuationsofdisplacement.Wedemonstratehowthenon-trivialcavitygeometrycanleadtobetterphonontrapping,enhancingthevar-ianceofzero-point-fluctuationsofdisplacement.Thisvariancebecomesinde-pendentofovertone(OT)number(orBAWresonancefrequency)overcomingtheconstra

8、intandallowingbetterobservationofquantumeffectsinamechanicalsystem.Thepiezoelectricelectro-mechanicalcouplingapproachisqualitativelycomparedtotheparamet