Superconducting Qubits: Parametric & Tunable Couplings

3:00 pm – 5:36 pm, Thursday March 20 // Session MAR-T17 //Anaheim Convention Center, 161 (Level 1)

Chair:: Rabins Wosti, University of South Carolina
Topics:
Sponsored by: DQI

Two-qubit gates for fluxonium qubits using a tunable coupler.

5:00 pm – 5:12 pm

Presenter: Abhishek Chakraborty (University of Rochester)

Authors: D. Dominic Briseno-Colunga (Chapman University), Noah Stevenson (University of California, Berkeley), Bibek Bhandari (Chapman University), Zahra Pedramrazi (University of California, Berkeley), Noah Goss (University of California, Berkeley), Chuanhong Liu (University of California, Berkeley), Andrew Jordan (Chapman University), Justin Dressel (Chapman University), David Santiago (Lawrence Berkeley National Laboratory), Irfan Siddiqi (University of California, Berkeley)

Tunable couplers enable the realization of efficient two-qubit gates with a high on/off coupling ratio and reduced crosstalk in a single design. In this work, we theoretically explore designs for fast, high-fidelity two-qubit gates between superconducting fluxonium qubits using an inductive tunable coupler. We use this coupler to realize gates from the f-Sim family using fast-flux control on the coupler and qubits. Additionally, we examine parametric two-qubit gates on this architecture to further improve gate performance. We also examine the effects of fabrication errors, leakage and decoherence in our design.

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