基于FPGA的量子实验控制单元的研究

Researoh on control unit in quantum experiment based on FPGA

量子实验控制单元可有效提高量子实验效率、增强结果准确性,以往设计出的量子实验控制单元均存在一些缺陷。针对该种现象,通过分析量子实验控制单元设计需求,设计出基于FPGA的量子实验控制单元。在温度控制中,FPGA使用比例、积分组合运算方式,将控制单元中热能转换器电流大小和流通方向的控制误差限制在0.4℃以下,使量子通信时间精度高于3.5ns。在激光脉冲控制中,FPGA控制激光发生器间歇给出等周期脉冲信号,并对脉冲信号进行集成输出,保证脉冲信号的通信同步性,缩减量子通信时延。为了避免FPGA数据误码影响控制工作,设计FPGA数据接收的逻辑结构,进一步增强了控制效果。实验结果显示,所设计的控制单元拥有优异的温度控制效果和激光脉冲控制效果。

Quantum experiment control unit can effectively improve experiment efficiency and enhance the accura- cy. In the past design of quantum experiment control unit has some defects. Therefore, through analyzing the experi- ment quantum control unit design requirements, design a quantum experiment control unit based on FPGA. In temper- ature control, the FPGA using a combination caloulation of proportion, integral, limit the control error of heat converter current size and the flow direction under 0.4 ℃ to make the quantum communication time precision higher than 3.5 ns. In the laser pulse control, FPGA control laser generator intermittently emits pulse signal is the same cycle, and in- tegrately the logical structtcre of data receiving was designed to output the pulse signal to ensure that the communication synchronization and shorten time delay. In order to avoid the influence of FPGA data error, further enhance the control effect. The experimental result shows that the design of the control unit has excellent control effects of temperature and laser pulse.