Entanglement swapping in a multi-module quantum computer

拥有模块化的量子计算机体系结构是至关重要的，因为一个量子计算模块不可能容纳足够多的量子比特。最近，我们成功地展示了一种新的基于量子计算模块之间电场链接的模块化量子计算体系结构，其连接率为24231/S，成功地将离子从一个模块传输到另一个模块，保真度为99.999993%。由于磁场梯度只有24T/m，以前的实验仅限于98.5%的两个量子比特门的保真度，而我们的芯片可以产生高达150T/m的纠缠门，使纠缠门的保真度超过相应的容错阈值。作为本项目的一部分，您将进行两个量子计算模块之间的纠缠交换演示。这次演示将包括在芯片上实现高保真的两个量子比特门，离子传输，包括演示两个量子计算模块之间的非绝热离子传输，以及完全交换协议下纠缠的全面表征。学生将进行一套通用的量子计算操作，以使原型设备具有完全可编程的多模块量子计算机的资格。

Having a modular quantum computer architecture is critical as it is impossible to fit sufficiently many qubits on a single quantum computing module. We recently succeeded in demonstrating a new modular quantum computing architecture based on electric field links between quantum computing modules demonstrating a connection rate of 2423 1/s with a success fidelity of transporting ions from one module to another of 99.999993%. While previous experiments were limited to a two qubit-gate fidelity of 98.5% because of the magnetic field gradient of only 24 T/m, our chip can produce up to 150 T/m, enabling entangling gates with fidelity above the relevant fault-tolerant threshold. As part of this project, you will carry out a demonstration of entanglement swapping between two quantum computing modules. This demonstration will include the realization of high-fidelity two-qubit gates on a chip, ion transport, including the demonstration of diabatic ion transport between the two quantum computing modules along with a full characterization of entanglement following the full swapping protocol. The student will carry out a universal set of quantum computing operations in order to qualify the prototype device as a fully programmable multi-module quantum computer.