Dresden 2026 – scientific programme
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QI: Fachverband Quanteninformation
QI 17: Decoherence and Open Systems II
QI 17.7: Talk
Thursday, March 12, 2026, 17:00–17:15, BEY/0137
Non-perturbative switching rates in bistable open quantum systems: from driven Kerr oscillators to dissipative cat qubits — •Leon Carde1, Ronan Gautier1, Nicolas Didier1, Alexandru Petrescu2, Joachim Cohen1, and Alexander McDonald3 — 1Alice&Bob, Paris, France — 2Mines ParisTech, Paris, France — 3University of Sherbrooke, Sherbrooke, Canada
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 accessible for systems subject to Gaussian noise obeying classical detailed balance, we generalize this approach to a class of quantum systems, those which satisfy the recently-introduced notion of hidden time-reversal symmetry. .In particular, in the context of quantum computing, we obtain analytical estimates of bit-flip error rates in cat-qubit architectures. We confirm these findings by comparing our results to numerically exact diagonalization of the Linbladian. Our results provide a path towards exploring switching phenomena in multistable open quantum systems
Keywords: Open Quantum Systems; Cat-qubits; Quantum computing