TY - JOUR
T1 - Radio-frequency capacitive gate-based sensing
AU - Ahmed, Imtiaz
AU - Haigh, James A.
AU - Schaal, Simon
AU - Barraud, Sylvain
AU - Zhu, Yi
AU - Lee, Chang-min
AU - Amado, Mario
AU - Robinson, Jason W.A.
AU - Rossi, Alessandro
AU - Morton, John J.L.
AU - Gonzalez-Zalba, M. Fernando
PY - 2018/7/19
Y1 - 2018/7/19
N2 - Developing fast, accurate, and scalable techniques for quantum-state readout is an active area in semiconductor-based quantum computing. Here, we present results on dispersive sensing of silicon corner state quantum dots coupled to lumped-element electrical resonators via the gate. The gate capacitance of the quantum device is placed in parallel with a superconducting spiral inductor resulting in resonators with loaded Q factors in the 400-800 range. We utilize resonators operating at 330 and 616 MHz, and achieve charge sensitivities of 7.7 and 1.3μe/Hz, respectively. We perform a parametric study of the resonator to reveal its optimal operation points and perform a circuit analysis to determine the best resonator design. The results place gate-based sensing on a par with the best reported radio-frequency single-electron transistor sensitivities while providing a fast and compact method for quantum-state readout.
AB - Developing fast, accurate, and scalable techniques for quantum-state readout is an active area in semiconductor-based quantum computing. Here, we present results on dispersive sensing of silicon corner state quantum dots coupled to lumped-element electrical resonators via the gate. The gate capacitance of the quantum device is placed in parallel with a superconducting spiral inductor resulting in resonators with loaded Q factors in the 400-800 range. We utilize resonators operating at 330 and 616 MHz, and achieve charge sensitivities of 7.7 and 1.3μe/Hz, respectively. We perform a parametric study of the resonator to reveal its optimal operation points and perform a circuit analysis to determine the best resonator design. The results place gate-based sensing on a par with the best reported radio-frequency single-electron transistor sensitivities while providing a fast and compact method for quantum-state readout.
KW - quantum computation
KW - quantum information architectures & platforms
KW - quantum information with solid state qubits
KW - radio frequency techniques
UR - http://www.scopus.com/inward/record.url?scp=85050410544&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.10.014018
DO - 10.1103/PhysRevApplied.10.014018
M3 - Article
AN - SCOPUS:85050410544
SN - 2331-7019
VL - 10
JO - Physical Review Applied
JF - Physical Review Applied
IS - 1
M1 - 014018
ER -