Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session P33: Superconducting Parametric/Tunable Interactions
2:30 PM–5:30 PM,
Wednesday, March 7, 2018
LACC
Room: 408B
Sponsoring
Unit:
DQI
Chair: David McKay, IBM T J Watson Res Ctr
Abstract ID: BAPS.2018.MAR.P33.3
Abstract: P33.00003 : Parametric entangling gates in a superconducting quantum processor, Part II: Dephasing due to modulation
3:18 PM–3:30 PM
Presenter:
Eyob Sete
(Rigetti Quantum Computing)
Authors:
Eyob Sete
(Rigetti Quantum Computing)
Nicolas Didier
(Rigetti Quantum Computing)
Chad Rigetti
(Rigetti Quantum Computing)
Parametric entangling gates can be operated at a flux bias that is first-order insensitive to flux-noise. However, parametric modulation itself induces frequency excursions from these flux sweet spots, which can degrade coherence and ultimately limit two-qubit parametric gate fidelities. In this talk, we analyze the effect of modulation on the dephasing rate, in particular, due to 1/f magnetic flux noise in asymmetric transmons. We show that the flux-bias modulation significantly affects the dephasing rate. It has been shown that the sensitivity to flux-noise can be reduced by increasing the asymmetry of the SQUID junctions. We, therefore, leverage our model to analyze the trade-off between the qubit frequency tunability and the effective qubit-qubit coupling for improving the performance of parametric entangling gates.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.P33.3
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