High-Coherence Kerr-Cat Qubit in 2D Architecture

Demonstrates a Kerr-cat qubit in a scalable planar superconducting circuit with an on-chip band-block filter.

Key Results

99.6% QND readout fidelity at a cat size of eight photons
Coherent-state lifetime near 0.95 ms at a cat size of eight
Universal-control primitives including an X(pi/2) gate driven by stabilization-phase modulation