Tootfinder

How the Kerr-Cat Qubit Dies-And How to Rescue It
Othmane Benhayoune-Khadraoui, Crist\'obal Lled\'o, Alexandre Blais
https://arxiv.org/abs/2507.06160

How the Kerr-Cat Qubit Dies-And How to Rescue It
Kerr-cat qubits have been experimentally shown to exhibit a large noise bias, with one decay channel suppressed by several orders of magnitude. In superconducting implementations, increasing the microwave drive on the nonlinear oscillator that hosts the Kerr-cat qubit should, in principle, further enhance this bias. Instead, experiments reveal that above a critical drive amplitude the tunneling time - the less dominant decay channel - ceases to increase and even decreases. Here, we show that th…