6 papers
Bit flips are erasures in dissipative cat qubits
Filippo Ferrari, Joachim Cohen, Vincenzo Savona +1
Autonomous quantum error correction (QEC) stabilizes a logical manifold through dissipative events that emit into output channels, which are typically accessible to measurement. Th…
Bit flips, saturation, and quantum chaos in dissipative cat qubits
Filippo Ferrari, Joachim Cohen, Vincenzo Savona +1
Bosonic cat qubits promise hardware-efficient quantum error correction because their logical bit-flip rate is exponentially suppressed with the photon number of the cat state. Howe…
Non-perturbative switching rates in bistable open quantum systems: from driven Kerr oscillators to dissipative cat qubits
Léon Carde, Ronan Gautier, Nicolas Didier +3
In this work, we use path integral techniques to predict the switching rate in a single-mode bistable open quantum system. While analytical expressions are well-known to be accessi…
Flux-pump induced degradation of for dissipative cat qubits
Léon Carde, Pierre Rouchon, Joachim Cohen +1
Dissipative stabilization of cat qubits autonomously corrects for bit flip errors by ensuring that reservoir-engineered two-photon losses dominate over other mechanisms inducing ph…
Tensor-network representation of excitations in Josephson junction arrays
Emilio Rui, Joachim Cohen, Alexandru Petrescu
We present a nonperturbative tensor-network approach to the excitation spectra of superconducting circuits based on Josephson junction arrays. These arrays provide the large lumped…
Enhancing dissipative cat qubit protection by squeezing
Rémi Rousseau, Diego Ruiz, Emanuele Albertinale +38
Dissipative cat-qubits are a promising architecture for quantum processors due to their built-in quantum error correction. By leveraging two-photon stabilization, they achieve an e…