论文标题
使用牙齿恢复损坏的对称性
Restoring broken symmetries using oracles
论文作者
论文摘要
我们提出了一种在量子计算机上多体系统中投影后执行变化的新方法，该方法不需要执行明确投影。该技术采用``甲骨文''的概念，通常用于量子搜索算法中。我们展示了如何构建与对称操作员相关的甲骨文和投影仪。说明了该过程的均等，粒子数和总自旋对称性。 Oracle用于使用单个辅助量子标题来通过间接测量来恢复对称性。该技术的说明是为了获得对哈密顿配对模型的近似基态能量的说明。
We present a new method to perform variation after projection in many-body systems on quantum computers that does not require performing explicit projection. The technique employs the notion of ``oracle'', generally used in quantum search algorithms. We show how to construct the oracle and the projector associated with a symmetry operator. The procedure is illustrated for the parity, particle number, and total spin symmetries. The oracle is used to restore symmetry by indirect measurements using a single ancillary qubit. An Illustration of the technique is made to obtain the approximate ground state energy for the pairing model Hamiltonian.
