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.

7 pages, 4 figures

References in corpus (9)

• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• Coupling of Spin and Orbital Motion of Electrons in Carbon Nanotubes
• Circuit Quantum Electrodynamics with a Spin Qubit
• Carbon nanotubes as ultra-high quality factor mechanical resonators
• Valley-spin blockade and spin resonance in carbon nanotubes
• Photon mediated interaction between distant quantum dot circuits
• Quantum dot admittance probed at microwave frequencies with an on-chip resonator
• Stamping single wall nanotubes for circuit quantum electrodynamics
• Realization of GHz-frequency impedance matching circuits for nano-scale devices

Cited by in corpus (2)

• Microwave spectroscopy of a carbon nanotube charge qubit
• Measurements of a Quantum Dot with an Impedance-Matching On-Chip LC Resonator at GHz Frequencies