6533b833fe1ef96bd129b956
RESEARCH PRODUCT
State Preparation and Tomography of a Nanomechanical Resonator with Fast Light Pulses
Ewold VerhagenGiada R. La GalaJuha MuhonenRick Leijssensubject
Quantum decoherenceNanophotonicsGeneral Physics and AstronomyFOS: Physical sciencesPhysics::Opticsnanotekniikka01 natural sciences0103 physical sciences010306 general physicskvanttifysiikkaQuantumPhysicsCouplingQuantum Physicsquantum measurementsbusiness.industryState (functional analysis)optomechanicsNanomechanical resonatorAmplitudefotoniikkaphotonic crystalsOptoelectronicsnanophotonicsTomographybusinessQuantum Physics (quant-ph)Optics (physics.optics)Physics - Opticsdescription
Pulsed optomechanical measurements enable squeezing, non-classical state creation and backaction-free sensing. We demonstrate pulsed measurement of a cryogenic nanomechanical resonator with record precision close to the quantum regime. We use these to prepare thermally squeezed and purified conditional mechanical states, and to perform full state tomography. These demonstrations exploit large photon-phonon coupling in a nanophotonic cavity to reach a single-pulse imprecision of 9 times the mechanical zero-point amplitude $x_\mathrm{zpf}$. We study the effect of other mechanical modes which limit the conditional state width to 58 $x_\mathrm{zpf}$, and show how decoherence causes the state to grow in time.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-12-23 |