On-Chip SNAIL-Based Parametric iSWAP Gate Between Two Fixed-Frequency Transmons with Suppressed ZZ Coupling
ORAL
Abstract
We report on an iSWAP gate between two fixed-frequency aluminum-based transmon qubits in a planar system. The iSWAP gate is activated by pumping at the difference between the two qubit frequencies on a Superconducting Nonlinear Asymmetric Inductive eLement (SNAIL) coupler, thus inducing three-wave parametric mixing between the two transmons. Unwanted static ZZ coupling between the two transmons is also suppressed by tuning the SNAIL such that frequency shifts from the second excited states of the two transmons on the two qubit computational state are canceled. Using quantum process tomography and randomized benchmarking, we characterize the two-qubit gate and report its fidelity.
*The devices in this research were fabricated at MIT Lincoln Laboratory under the Superconducting Qubits at Lincoln Laboratory (SQUILL) program.
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Presenters
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Zhuo Shen
- University of Maryland, College Park