Ryan Colm A, Johnson Blake R, Ristè Diego, Donovan Brian, Ohki Thomas A
Raytheon BBN Technologies, Cambridge, Massachusetts 02138, USA.
Rev Sci Instrum. 2017 Oct;88(10):104703. doi: 10.1063/1.5006525.
We describe the hardware, gateware, and software developed at Raytheon BBN Technologies for dynamic quantum information processing experiments on superconducting qubits. In dynamic experiments, real-time qubit state information is fed back or fed forward within a fraction of the qubits' coherence time to dynamically change the implemented sequence. The hardware presented here covers both control and readout of superconducting qubits. For readout, we created a custom signal processing gateware and software stack on commercial hardware to convert pulses in a heterodyne receiver into qubit state assignments with minimal latency, alongside data taking capability. For control, we developed custom hardware with gateware and software for pulse sequencing and steering information distribution that is capable of arbitrary control flow in a fraction of superconducting qubit coherence times. Both readout and control platforms make extensive use of field programmable gate arrays to enable tailored qubit control systems in a reconfigurable fabric suitable for iterative development.
我们介绍了雷神公司BBN技术公司为超导量子比特的动态量子信息处理实验而开发的硬件、门控软件和软件。在动态实验中，实时量子比特状态信息在量子比特相干时间的一小部分内进行反馈或前馈，以动态改变所执行的序列。这里介绍的硬件涵盖了超导量子比特的控制和读出。对于读出，我们在商用硬件上创建了一个定制的信号处理门控软件和软件堆栈，以将外差接收机中的脉冲转换为具有最小延迟的量子比特状态分配，同时具备数据采集能力。对于控制，我们开发了带有门控软件和软件的定制硬件，用于脉冲序列控制和转向信息分配，能够在超导量子比特相干时间的一小部分内实现任意控制流。读出和控制平台都广泛使用现场可编程门阵列，以在适合迭代开发的可重构架构中实现定制的量子比特控制系统。
