光阵面部分子关联函数的量子模拟
Quantum Simulation of Light-Front Parton Correlators
摘要：
高能对撞机的物理学依赖于不同的非微扰部分子关联函数的知识，如部分子分布函数，它编码了关于普适强子结构的信息，因此是这种碰撞中潜在过程的任何因子分解定理的主要组成部分。这些函数是用规范不变的光阵面算子给出的，它们在空间和实时都是非局部的，因此由于众所周知的符号问题，标准格点技术是难以处理的。在本文中，我们提出了一个量子算法来执行量子模拟的这些类型的双光子晶体，并说明它考虑时空威尔逊圈。我们讨论的实现的量子算法的量子门，可在实际的量子技术，如冷原子设置，捕获离子或超导电路。
英文摘要：
The physics of high-energy colliders relies on the knowledge of different non-perturbative parton correlators, such as parton distribution functions, that encode the information on universal hadron structure and are thus the main building blocks of any factorization theorem of the underlying process in such collision. These functions are given in terms of gauge-invariant light-front operators, they are non-local in both space and real time, and are thus intractable by standard lattice techniques due to the well-known sign problem. In this paper, we propose a quantum algorithm to perform a quantum simulation of these type of correlators, and illustrate it by considering a space-time Wilson loop. We discuss the implementation of the quantum algorithm in terms of quantum gates that are accessible within actual quantum technologies such as cold atoms setups, trapped ions or superconducting circuits.
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