Qubit Zoo

Qubit Architecture with High Coherence and Fast Tunable Coupling

1 min read

Introduces the gmon qubit: an Xmon transmon with an integrated tunable coupler based on a shared inductance loop. Enables fast switching between zero and strong coupling, allowing high-fidelity two-qubit gates without residual ZZ interaction.

Key Results

  • Tunable coupling: 0 to 30 MHz, switchable in ~10 ns
  • Integrated coupler (no separate coupler qubit needed)
  • Two-qubit iSWAP gate time: ~12 ns
  • Architecture used in Google’s quantum supremacy processor

Graph View

Backlinks