Qubit Zoo

Stabilization and operation of a Kerr-cat qubit

1 min read

First experimental demonstration of a Kerr-cat qubit: a bosonic qubit encoded in two coherent states of a superconducting nonlinear oscillator (SNAIL), stabilized by a two-photon drive. Shows exponential suppression of bit-flip errors with increasing cat size while phase-flip rate grows only linearly — a key asymmetry exploitable by biased-noise QEC codes.

Key Results

  • Bit-flip time increases exponentially with mean photon number n̄
  • Phase-flip rate grows linearly with n̄
  • Achieved bit-flip times > 1 ms at n̄ ≈ 4
  • Gate operations demonstrated via parametric drives

Graph View

Backlinks