论文标题
对称辅助准备纠缠多体状态在量子计算机上的准备
Symmetry assisted preparation of entangled many-body states on a quantum computer
论文作者
论文摘要
从量子相遗传（QPE）算法开始，提出了一种方法来构建描述量子计算机上相关多体系统的纠缠状态。使用已知离散特征值集的操作员，QPE方法之后是用作纠缠状态的投影仪的测量值。然后可以将这些状态用作进一步的量子或混合量子古典处理的输入。当操作员与哈密顿量的对称性相关联时，该方法可以看作是量子 - 计算机的对称性破坏，然后进行对称恢复。这项工作中提出的称为离散光谱辅助（DSA）的方法应用于超流体系统。通过使用适合Qubits的阻止技术，可以获得配对的哈密顿配对的完整光谱。
Starting from the Quantum-Phase-Estimate (QPE) algorithm, a method is proposed to construct entangled states that describe correlated many-body systems on quantum computers. Using operators for which the discrete set of eigenvalues is known, the QPE approach is followed by measurements that serve as projectors on the entangled states. These states can then be used as inputs for further quantum or hybrid quantum-classical processing. When the operator is associated to a symmetry of the Hamiltonian, the approach can be seen as a quantum--computer formulation of symmetry breaking followed by symmetry restoration. The method proposed in this work, called Discrete Spectra Assisted (DSA), is applied to superfluid systems. By using the blocking technique adapted to qubits, the full spectra of a pairing Hamiltonian is obtained.
