采用相干态正交化展开方法，对三量子比特的纠缠度影响因素进行了分析研究，并运用数值计算，结合解析解，在光场初态为真空态的相互作用过程中，对三量子比特的纠缠情况进行了研究。分析了三个全同的量子比特纠缠度随光场频率的变化规律以及光场量子比特耦合强度对三量子比特纠缠度的影响。研究结果表明，三量子比特的本征能量和共生纠缠度随光场频率、时间g0t的演化与耦合强度有关，而三量子比特的本征能量和共生纠缠度随时间gt的演化与耦合强度无关。

The coherent state orthogonalization expansion method is used to analyze and investigate the factors influencing the three-qubit entanglement degree. In addition, the three-qubit entanglement in the interaction process with the vacuum state as the initial state of the light field is investigated by numerical calculation combined with analytical solution. The relationship between the entanglement degree of three identical qubits and the light field frequency as well as the influence of light-field-qubit coupling strength on the three-qubit entanglement degree is analyzed. The research results show that the evolutions of the three-qubit intrinsic energy and the three-qubit co-occurrence entanglement degree with light field frequency and time g0t are related to the coupling strength, while the evolutions with time gt have nothing to do with the coupling strength.