Quantum capacitance mediated carbon nanotube optomechanics

Abstract

Cavity optomechanics allows the characterization of a vibration mode, its cooling and quantum manipulation using electromagnetic fields. Regarding nanomechanical as well as electronic properties, single wall carbon nanotubes are a prototypical experimental system. At cryogenic temperatures, as high quality factor vibrational resonators, they display strong interaction between motion and single-electron tunneling. Here, we demonstrate large optomechanical coupling of a suspended carbon nanotube quantum dot and a microwave cavity, amplified by several orders of magnitude via the nonlinearity of Coulomb blockade. From an optomechanically induced transparency (OMIT) experiment, we obtain a single photon coupling of up to $g_0=2\pi \cdot 95\text{Hz}$. This indicates that normal mode splitting and full optomechanical control of the carbon nanotube vibration in the quantum limit is reachable in the near future. Mechanical manipulation and characterization via the microwave field can be complemented by the manifold physics of quantum-confined single electron devices.

arXiv comment6 pages, 4 figures; published version (open access)

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• Proposal for a nanomechanical qubit
• Nanoassembly technique of carbon nanotubes for hybrid circuit-QED
• Phonon-induced pairing in quantum dot quantum simulator
• Quantum Nondemolition Photon Counting With a Hybrid Electromechanical Probe
• Nano-assembled open quantum dot nanotube devices
• Radiation pressure backaction on a hexagonal boron nitride nanomechanical resonator
• Stepwise fabrication and optimization of coplanar waveguide resonator hybrid devices
• Resonator induced quantum phase transitions in a hybrid Josephson junction
• Optomechanical coupling and damping of a carbon nanotube quantum dot
• Energy spectrum and structure of one-dimensional few-electron Wigner crystals with and without coupling to light in cavity