Superconducting Circuit Experiment Demonstrates Quantum Control of Inherently Protected Cat Qubit with Exceptional Bit-Flip Resilience

Quantum bits (qubits) can be made inherently resilient to bit-flip errors by encoding them in the metastable states of a quantum dynamical system, forming a "cat qubit". This experiment demonstrates the ability to control the phase of such a cat qubit without compromising its exceptional bit-flip protection, a critical milestone for practical quantum computing.