Quantum information encoded into the superposition of coherent states is an illustrative representation of practical applications of macroscopic quantum coherence possessing. However, these states are very sensitive to energy loss, losing their non-classical aspects of coherence very rapidly. An available deterministic strategy to slow down this decoherence process is to apply a Gaussian squeezing transformation prior to the loss as a protective step. Here, we propose a deterministic hybrid protection scheme utilizing strong but feasible interactions with two-level ancillas immune to spontaneous emission. We verify the robustness of the scheme against the dephasing of qubit ancilla. Our scheme is applicable to complex superpositions of coherent states in many oscillators, and remarkably, the robustness to loss is enhanced with the amplitude of the coherent states. This scheme can be realized in experiments with atoms, solid-state systems, and superconducting circuits.

编码成相干态叠加的量子信息是宏观量子相干所拥有的实际应用的说明性表示。然而，这些状态对能量损失非常敏感，很快就失去了它们非经典的相干性方面。减缓这种退相干过程的可用确定性策略是在损失之前应用高斯压缩变换作为保护步骤。在这里，我们提出了一种确定性混合保护方案，该方案利用与自发发射免疫的两级附属物的强但可行的相互作用。我们验证了该方案对 qubit ancilla 去相位的鲁棒性。我们的方案适用于许多振荡器中相干态的复杂叠加，并且值得注意的是，相干状态的幅度增强了对损失的鲁棒性。该方案可以在原子、固态系统和超导电路的实验中实现。