论文标题
多光子，多维超距离使用高阶radix Qudits，以及用于量子计算，QKD和量子传送的应用
Multi-Photon, Multi-Dimensional Hyper-Entanglement using Higher-Order Radix qudits with Applications to Quantum Computing, QKD and Quantum Teleportation
论文作者
论文摘要
Google最近宣布，他们已经用53个量子位（Base-2二进制文件或Radix-2）实现了量子至上，对应于维度253（约1016）的计算状态空间。 Google声称执行了在其量子处理器上花费200秒的计算，该计算将花费10，000年的时间才能完成经典的超级计算机[1]。但是，考虑到使Qubit的环境噪声折叠的环境噪声，实现53吨的垂直和纠缠并不是一件容易的任务。在本文中，我们声称可以使用光子系统（即带有radix-10的16个Qudits）实现具有更少的Qudit（而不是Qudit）的相似计算维度（而不是Qudit）。本文是行业与NXGEN合作伙伴之间的协作发展，以探讨这种方法。有一种雷神技术使用自由空间光学（FSO）Fabry-Perot Etalon，它消除了对自适应光学的需求[2，3]。 NXGEN技术使用多个轨道角动量（OAM）模式作为量子计算的新自由度和多维QKD [4-7]。我们还声称，宽带，安全通信，量子计算和量子传送的收敛仅在光子学实现中才有可能。因此，光子量的使用允许扩展量子传送的安全性和能力，超出了中国米修斯量子卫星所实现的范围[8]。国防和商业计算行业都需要这样的量子计算系统。引入了一个新的措施，其中包括计算状态空间维度，高保真操作，高连接性，大型校准门集和电路重写工具链。我们称之为量子能力的这种新措施是衡量和比较改善通用量子计算机系统结构的实用方法。
Google recently announced that they had achieved quantum supremacy with 53 qubits (base-2 binaries or radix-2), corresponding to a computational state-space of dimension 253 (about 1016). Google claimed to perform computations that took 200 seconds on their quantum processor that would have taken 10,000 years to accomplish on a classical supercomputer [1]. However, achieving superposition and entanglement of 53 qubits is not an easy task given the environmental noise that decoheres the qubits. In this paper, we claim that one can potentially achieve a similar computational dimension with fewer qudits (not qubits) where each qudit is of a higher radix (greater than 2) using a photonics system (i.e. 16 qudits with radix-10). This paper is a collaborative development between industry and NxGen Partners to explore such an approach. There is a Raytheon technology that uses a Free-Space Optical (FSO) Fabry-Perot Etalon that eliminates the need for adaptive optics [2, 3]. The NxGen technology uses multiple Orbital Angular Momentum (OAM) modes as a new degree of freedom for quantum computing and a multi-dimensional QKD [4-7]. We also claim that the convergence of both broadband, secure communications, quantum computing and quantum teleportation is only possible in a photonics realization. Therefore, the use of photonic qudits allows the extension of security and capacity of the quantum teleportation beyond what was achieved by Chinese Micius quantum satellite [8]. Both the defense and commercial computing industries need such quantum computing systems. A new measure is introduced with computational state-space dimension, high-fidelity operations, high connectivity, large calibrated gate sets, and circuit rewriting toolchains. This new measure which we call quantum capacity is a practical way to measure and compare progress toward improved system structure of a universal quantum computer.
