Ultrastrong coupling between electron tunneling and mechanical motion

Abstract

The ultrastrong coupling of single-electron tunneling and nanomechanical motion opens exciting opportunities to explore fundamental questions and develop new platforms for quantum technologies. We have measured and modeled this electromechanical coupling in a fully-suspended carbon nanotube device and report a ratio of $g_{\mathrm{m}}/{\omega }_{\mathrm{m}}=2.72\pm 0.14$, where $g_{\mathrm{m}}/2\pi =0.80\pm 0.04$ GHz is the coupling strength and ${\omega }_{\mathrm{m}}/2\pi =294.5$ MHz is the mechanical resonance frequency. This is well within the ultrastrong coupling regime and the highest among all other electromechanical platforms. We show that, although this regime was present in similar fully-suspended carbon nanotube devices, it went unnoticed. Even higher ratios could be achieved with improvement on device design.

arXiv comment13 pages, 11 figures This new version contains the same model and analysis but applied to new experimental data compared to the previous version. This is why the coupling ratio is now 2.72 instead of 1.3 and most of the experimental parameters have changed

References in corpus (51)

• Cavity Optomechanics
• Spins in few-electron quantum dots
• A tunable carbon nanotube electromechanical oscillator
• Carbon Nanotubes as Schottky Barrier Transistors
• Ultrastrong coupling regimes of light-matter interaction
• Strong magnetic coupling between an electronic spin qubit and a mechanical resonator
• Ultrasensitive force detection with a nanotube mechanical resonator
• Strong coupling between single-electron tunneling and nano-mechanical motion
• A single NV defect coupled to a nanomechanical oscillator
• Franck-Condon blockade in suspended carbon nanotube quantum dots
• Hybrid circuit cavity quantum electrodynamics with a micromechanical resonator
• Strain-mediated coupling in a quantum dot-mechanical oscillator hybrid system
• Theory of the Franck-Condon blockade regime
• Nanotube mechanical resonators with quality factors of up to 5 million
• Single-photon cavity optomechanics mediated by a quantum two-level system
• Carbon Nanotubes as Nanoelectromechanical Systems
• Strong coupling of a mechanical oscillator and a single atom
• Mesoscopic physics of nanomechanical systems
• Unexpected Scaling of the Performance of Carbon Nanotube Transistors
• Real-Space Tailoring of the Electron-Phonon Coupling in Ultra-Clean Nanotube Mechanical Resonators
• Resonant coupling of a Bose-Einstein condensate to a micromechanical oscillator
• Enhancing optomechanical coupling via the Josephson effect
• Faithful conversion of propagating quantum information to mechanical motion
• Hybrid Mechanical Systems
• Damping of a nanomechanical oscillator strongly coupled to a quantum dot
• A coherent nanomechanical oscillator driven by single-electron tunnelling
• Ultrasensitive Displacement Noise Measurement of Carbon Nanotube Mechanical Resonators
• Strong and tunable mode coupling in carbon nanotube resonators
• A cavity-Cooper pair transistor scheme for investigating quantum optomechanics in the ultra-strong coupling regime
• Cooling and Self-Oscillation in a Nanotube Electro-Mechanical Resonator
• Probing the charge of a quantum dot with a nanomechanical resonator
• Coupling carbon nanotube mechanics to a superconducting circuit
• Inducing micromechanical motion by optical excitation of a single quantum dot
• Proposal for a nanomechanical qubit
• Capacitive Spring Softening in Single-Walled Carbon Nanotube Nanoelectromechanical Resonators
• Resonant optomechanics with a vibrating carbon nanotube and a radio-frequency cavity
• Reversible work extraction in a hybrid opto-mechanical system
• Electron-vibron coupling in suspended carbon nanotube quantum dots
• Flux-mediated optomechanics with a transmon qubit in the single-photon ultrastrong-coupling regime
• Signatures of the Current Blockade Instability in Suspended Carbon Nanotubes
• Displacemon electromechanics: how to detect quantum interference in a nanomechanical resonator
• Single electron tunneling through high-Q single-wall carbon nanotube NEMS resonators
• Strong and tunable couplings in flux-mediated optomechanics
• An autonomous quantum machine to measure the thermodynamic arrow of time
• Stochastic thermodynamics of self-oscillations: the electron shuttle
• Ultra-Strong Optomechanics Incorporating the Dynamical Casimir Effect
• Reaching the optomechanical strong coupling regime with a single atom in a cavity
• Electro-Mechanical Transition in Quantum dots
• Exploring unresolved sideband, optomechanical strong coupling using a single atom coupled to a cavity
• Proposal of a realistic stochastic rotor engine based on electron shuttling
• Measuring carbon nanotube vibrations using a single-electron transistor as a fast linear amplifier

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• Nonlinear nanomechanical resonators approaching the quantum ground state
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• Stability of long-sustained oscillations induced by electron tunneling
• Cooper quartets in interacting hybrid superconducting systems
• Steady-state Peierls transition in nanotube quantum simulator
• Thermodynamic and energetic constraints on transition probabilities of small-scale quantum systems
• Extra cost of erasure due to quantum lifetime broadening
• Lindblad theory for incoherently-driven electron transport in molecular nanojunctions
• Emergent Bell Phase in an Electro-Nanomechanical Quantum Simulator