6533b820fe1ef96bd1279b0d
RESEARCH PRODUCT
Cavity optomechanics mediated by a quantum two-level system
Tero T. HeikkiläJani TuorilaJuha-matti PirkkalainenMika SillanpääSung Un ChoFrancesco MasselPertti Hakonensubject
Josephson effectPhotonOrders of magnitude (temperature)Josephson junction qubitta221General Physics and AstronomyPhysics::Optics02 engineering and technologyBioinformatics01 natural sciencesArticleGeneral Biochemistry Genetics and Molecular BiologyResonatorComputer Science::Emerging TechnologiesCondensed Matter::SuperconductivityQuantum mechanics0103 physical sciences010306 general physicsQuantumOptomechanicsta218PhysicsMultidisciplinaryta214ta114Quantum limitGeneral Chemistrycavity optomechanics021001 nanoscience & nanotechnologyQubit0210 nano-technologydescription
Coupling electromagnetic waves in a cavity and mechanical vibrations via the radiation pressure of photons is a promising platform for investigations of quantum–mechanical properties of motion. A drawback is that the effect of one photon tends to be tiny, and hence one of the pressing challenges is to substantially increase the interaction strength. A novel scenario is to introduce into the setup a quantum two-level system (qubit), which, besides strengthening the coupling, allows for rich physics via strongly enhanced nonlinearities. Here we present a design of cavity optomechanics in the microwave frequency regime involving a Josephson junction qubit. We demonstrate boosting of the radiation–pressure interaction by six orders of magnitude, allowing to approach the strong coupling regime. We observe nonlinear phenomena at single-photon energies, such as an enhanced damping attributed to the qubit. This work opens up nonlinear cavity optomechanics as a plausible tool for the study of quantum properties of motion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-02-12 | NATURE COMMUNICATIONS |