Clean carbon nanotubes coupled to superconducting impedance-matching circuits

Abstract

Coupling carbon nanotube devices to microwave circuits offers a significant increase in bandwidth and signal-to-noise ratio. These facilitate fast non-invasive readouts important for quantum information processing, shot noise and correlation measurements. However, creation of a device that unites a low-disorder nanotube with a low-loss microwave resonator has so far remained a challenge, due to fabrication incompatibility of one with the other. Employing a mechanical transfer method, we successfully couple a nanotube to a gigahertz superconducting matching circuit and thereby retain pristine transport characteristics such as the control over formation of, and coupling strengths between, the quantum dots. Resonance response to changes in conductance and susceptance further enables quantitative parameter extraction. The achieved near matching is a step forward promising high-bandwidth noise correlation measurements on high impedance devices such as quantum dot circuits.

arXiv comment7 pages, 4 figures

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• Review of performance metrics of spin qubits in gated semiconducting nanostructures
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• Highly coherent spin states in carbon nanotubes coupled to cavity photons
• Resonant and inelastic Andreev tunneling observed on a carbon nanotube quantum dot
• Quantum capacitance mediated carbon nanotube optomechanics
• Dynamical multistability in a quantum-dot laser
• Rapid microwave-only characterization and readout of quantum dots using multiplexed gigahertz-frequency resonators
• Hybrid quantum device with a carbon nanotube and a flux qubit for dissipative quantum engineering
• Microwave spectroscopy of a carbon nanotube charge qubit
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• Broadband architecture for galvanically accessible superconducting microwave resonators
• Shot noise of a quantum dot measured with GHz stub impedance matching
• Fork stamping of pristine carbon nanotubes onto ferromagnetic contacts for spin-valve devices
• Measurements of a Quantum Dot with an Impedance-Matching On-Chip LC Resonator at GHz Frequencies
• Co-sputtered MoRe thin films for carbon nanotube growth-compatible superconducting coplanar resonators
• Nanoassembly technique of carbon nanotubes for hybrid circuit-QED
• Quartz tuning-fork based carbon nanotube transfer into quantum device geometries
• Charge-sensing of a Ge/Si core/shell nanowire double quantum dot using a high-impedance superconducting resonator
• Towards carbon nanotube growth into superconducting microwave resonator geometries
• Supercurrent and phase slips in a ballistic carbon nanotube embedded into a van der Waals heterostructure
• Entangled Photon-Pair Emission in Waveguide Circuit QED from a Cooper Pair Splitter
• Intrinsic process for upconversion photoluminescence via $K$-momentum phonon coupling in carbon nanotubes
• Nano-assembled open quantum dot nanotube devices
• Contact-less characterizations of encapsulated graphene p-n junctions
• Radio-frequency characterization of a supercurrent transistor made from a carbon nanotube
• GHz operation of a quantum point contact using stub impedance matching circuit
• Dispersive detection of single microwave photons with quantum dots