核磁共振量子计算平台基于原子核自旋以及两体相互作用而形成的可控多体核自旋量子系统，目前高维度的多体核自旋体系在以下方面仍存在难题，如液晶体系的高灵敏性、高精度选择性操控、精密的量子测量和读出等。介于存在的这些棘手问题，我们探索性开展并研究多态相的多体核自旋量子体系，以实现多体核自旋纠缠态的实验制备、相干控制以及实验测量，从而来研究量子纠缠态对称性在量子信息领域中的作用。当前量子纠缠的测量仍旧依赖于繁琐的量子态重构过程，而量子态重构过程的复杂度随着系统维度指数增加，面对这样一个瓶颈性的科学问题，我们调研并尝试牺牲多项式的辅助比特资源，来替代指数式的量子态重构过程去等效实现量子纠缠的测量。我们将进一步在实验上验证这种量子纠缠测量新方法的有效性和扩展性，并将其适当推广到开放多体量子体系，以实现更加广泛的应用。

Nuclear magnetic resonance quantum computing platform is a controllable many-body nuclear spin quantum system, which consists mainly of nuclear spin and two-body interactions. Currently, there are still so many challenges in the following aspects for high-dimensional many-body nuclear spin quantum systems, such as, high sensitivity of liquid crystal quantum systems, highly accurate selective control and precise quantum measurement and readout. Facing such tough problems, we exploringly develop and study many-body nuclear spin quantum system with different states of matter, to realize the experimental preparation, coherent control and experiemental measurements of entanglement states of many-body nuclear spin systems, further to study the functions of symmetry of quantum entanglement states in the quantum information area. At present, it is still believed that the efficient measurement of quantum entanglement strongly depends on complicated quantum states reconstruction, whose complexity increases exponentially with the dimensionality of quantum systems. In the face of such a scientific trouble, we investigate and test the possibility of equivalently measuring quantum entanglement using the polynomial ancillary qubits instead of exponential quantum state reconstruction. We further test the effectiveness and expandability of the new method in experiments, and properly extend to open many-body nuclear spin quantum system to realize more far-ranging applications.