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Updated: Mar 22, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Catability as a Metric for Evaluating Superposed Coherent States
Šimon Bräuer1, Jan Provazník1, Vojtěch Kala1
1Palacký University, Optics Department, Faculty of Science, 17. Listopadu 12, 77146 Olomouc, Czech Republic.
Abstract:
Superposed coherent states are central to quantum technologies, yet their reliable identification remains a challenge, especially in noisy or resource-constrained settings. We introduce a novel, directly measurable criterion for detecting catlike features in quantum states. The criterion is based on the concept of nonlinear squeezing and bypasses the need for full state tomography of the tested states. The numerical results confirm its robustness under loss and its potential for experimental implementation. The method naturally generalizes to more exotic superpositions, including multiheaded cat states.
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