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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Circuit Quantum Electrodynamics with Carbon-Nanotube-Based Superconducting Quantum Circuits
AU - Mergenthaler, M.
AU - Nersisyan, A.
AU - Patterson, A.
AU - Esposito, M.
AU - Baumgartner, A.
AU - Schönenberger, C.
AU - Briggs, G.A.D.
AU - Laird, E.A.
AU - Leek, P.J.
N1 - © 2021 American Physical Society
PY - 2021/6/30
Y1 - 2021/6/30
N2 - Hybrid circuit QED involves the study of coherent quantum physics in solid-state systems via their interactions with superconducting microwave circuits. Here we present a crucial step in the implementation of a hybrid superconducting qubit that employs a carbon nanotube as a Josephson junction. We realize the junction by contacting a carbon nanotube with a superconducting Pd/Al bilayer, and implement voltage tunability of the quantum circuit's frequency using a local electrostatic gate. We demonstrate a strong dispersive coupling to a coplanar waveguide resonator by investigating the gate-tunable resonator frequency. We extract qubit parameters from spectroscopy using dispersive readout and find qubit relaxation and coherence times in the range of 10-200ns.
AB - Hybrid circuit QED involves the study of coherent quantum physics in solid-state systems via their interactions with superconducting microwave circuits. Here we present a crucial step in the implementation of a hybrid superconducting qubit that employs a carbon nanotube as a Josephson junction. We realize the junction by contacting a carbon nanotube with a superconducting Pd/Al bilayer, and implement voltage tunability of the quantum circuit's frequency using a local electrostatic gate. We demonstrate a strong dispersive coupling to a coplanar waveguide resonator by investigating the gate-tunable resonator frequency. We extract qubit parameters from spectroscopy using dispersive readout and find qubit relaxation and coherence times in the range of 10-200ns.
KW - Coplanar waveguides
KW - Electric network analysis
KW - Electrodynamics
KW - Microwave circuits
KW - Quantum theory
KW - Qubits
KW - Resonators
KW - Semiconductor junctions
KW - Timing circuits
KW - Electrostatic gates
KW - Quantum electrodynamics
KW - Solid-state system
KW - Superconducting quantum circuit
KW - Superconducting qubits
KW - Tunable resonators
KW - Voltage tunability
KW - Waveguide resonators
KW - Carbon nanotubes
U2 - 10.1103/PhysRevApplied.15.064050
DO - 10.1103/PhysRevApplied.15.064050
M3 - Journal article
VL - 15
JO - Physical Review Applied
JF - Physical Review Applied
SN - 2331-7019
IS - 6
M1 - 064050
ER -