3He-4He-Entmischungskryostat (cryogen-free) mit Elektronik für Quantenmessungen mit Mikrowellen

我们通过与超导量子比特的强耦合研究了铁磁体中的磁振子。为了探测自旋波的最基本性质，需要最低的温度。无低温稀释冰箱是一个强大而通用的系统，允许达到非常低的温度（10 mK），而不需要任何低温。不需要昂贵的氦气，也不需要额外的个人成本来运行或维护系统。鉴于其巨大的样品空间，可以为各种研究目的进行自制定制，例如额外的磁线圈，更多的样品或广泛的微波组件。为了在微波频率下以光谱和脉冲方式探测量子电路，需要以下组件：20 GHz矢量网络分析仪，2.3 GS/s任意波形发生器，500 MHz示波器，3个20 GHz微波发生器，低频信号分析仪，微波频谱分析仪，500 MHz模数卡，一个10 MHz频率标准，低温（1倍）和室温（2倍）微波放大器，3个微波循环器，微波开关，低温同轴电缆，IQ混频器（3倍）和两台计算机。这种设置将允许我们通过相干耦合到一个完全外部控制的超导量子比特来探测磁振子的基本特性。

We study magnons in ferromagnets by strong coupling to superconducting qubits. To probe the most fundamental properties of the spin waves, the lowest temperatures are needed. A cryogenic free dilution refrigerator is a powerful and versatile system that allows reaching very low temperature (10 mK) without the need of any cryogenics. No expensive helium and no additional personal cost are needed to run or maintain the system. Given its large sample space home-made customization for various research purposes is possible, such as additional magnetic coils, more samples, or extensive microwave components. To probe the quantum circuits spectroscopically and pulsed at microwave frequencies the following components are required: 20 GHz vector network analyzer, 2.3 GS/s arbitrary waveform generator, 500 MHz oscilloscope, three 20 GHz microwave generators, low frequency signal analyzer, microwave spectrum analyzer, 500 MHz analog-digital card, a 10 MHz frequency standard, cryogenic (1x) and room-temperature (2x) microwave amplifiers, three microwave circulators, microwave switch, cryogenic coaxial cables, IQ mixer (3x) and two computers. This setup will allow us to probe the fundamental properties of magnons by coherent coupling to a fully externally controlled superconducting qubit.