Deterministic feedforward-based generation of large optical coherent-state superposition
The paper proposes a deterministic feedforward protocol using qubit-mode dispersive coupling to create large optical coherent-state superpositions, which are vital for quantum technologies like sensing and error correction. This new method outperforms existing three-mode detection schemes in fidelity and quantum properties. It also provides a way to detect weak displacements of interference fringes as a reliable witness for quantum interference.