Cavity-mediated coupling of mechanical oscillators limited by quantum backaction
| Autor: | L. F. Buchmann, Dan Stamper-Kurn, Nicolas Spethmann, Jonathan Kohler, Sydney Schreppler |
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| Rok vydání: | 2015 |
| Předmět: |
Atomic Physics (physics.atom-ph)
Physics::Optics General Physics and Astronomy FOS: Physical sciences Quantum imaging 01 natural sciences 010305 fluids & plasmas Physics - Atomic Physics Open quantum system Quantum mechanics 0103 physical sciences 010306 general physics Trapped ion quantum computer Quantum optics Physics Quantum network Quantum Physics Quantum sensor Cavity quantum electrodynamics Quantum technology Quantum Gases (cond-mat.quant-gas) Computer Science::Programming Languages Condensed Matter - Quantum Gases Quantum Physics (quant-ph) Physics - Optics Optics (physics.optics) |
| Zdroj: | Nature Physics |
| DOI: | 10.48550/arxiv.1505.05850 |
| Popis: | A complex quantum system can be constructed by coupling simple quantum elements to one another. For example, trapped-ion or superconducting quantum bits may be coupled by Coulomb interactions, mediated by the exchange of virtual photons. Alternatively quantum objects can be coupled by the exchange of real photons, particularly when driven within resonators that amplify interactions with a single electro-magnetic mode. However, in such an open system, the capacity of a coupling channel to convey quantum information or generate entanglement may be compromised. Here, we realize phase-coherent interactions between two spatially separated, near-ground-state mechanical oscillators within a driven optical cavity. We observe also the noise imparted by the optical coupling, which results in correlated mechanical fluctuations of the two oscillators. Achieving the quantum backaction dominated regime opens the door to numerous applications of cavity optomechanics with a complex mechanical system. Our results thereby illustrate the potential, and also the challenge, of coupling quantum objects with light. Comment: 25 pages, 6 figures |
| Databáze: | OpenAIRE |
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