论文标题
用于粒子衰变量子计算的算法
An Algorithm for Quantum Computation of Particle Decays
论文作者
论文摘要
开发了一种量子算法，以使用量子资源来计算衰减速率和横截面，该量子资源在系统大小上多个尺度缩放，假设状态制备和时间演变相似。这是通过在量子硬件上计算有限体积的单粒子绿色功能来完成的。粒子衰减速率和两个粒子散射截面是从绿色功能的假想部分中提取的。在IBM的超导量子硬件上证明了该方法的$ 0+1 $尺寸实现，以使沉重的标量粒子衰减到一对光标量。
A quantum algorithm is developed to calculate decay rates and cross sections using quantum resources that scale polynomially in the system size assuming similar scaling for state preparation and time evolution. This is done by computing finite-volume one- and two-particle Green's functions on the quantum hardware. Particle decay rates and two particle scattering cross sections are extracted from the imaginary parts of the Green's function. A $0+1$ dimensional implementation of this method is demonstrated on IBM's superconducting quantum hardware for the decay of a heavy scalar particle to a pair of light scalars.
