标题： 一种用于原子玻色-爱因斯坦凝聚实验的简单磁场稳定技术 显示英文标题

标题： A simple magnetic field stabilization technique for atomic Bose-Einstein condensate experiments

摘要： 我们展示了一种在玻色-爱因斯坦凝聚实验中简单的磁场稳定技术。 我们的技术基于对主磁场线圈中电流波动的精确测量，并通过辅助线圈对其进行补偿。 其优势在于简单性，因为补偿是使用低电感线圈完成的，该线圈可以很容易地在相关频率（1 kHz）下驱动。 不同组件（电源、电流变送器、电子设备等）的性能被精确表征。 此外，为了获得最佳稳定性，环境磁场也被测量并进行补偿。 通过钾-39两个自旋态之间对磁场敏感的射频跃迁的拉姆齐光谱学测量，测得了约57 G的磁场稳定性，单次测量的波动降低到64(7)$\mu$G均方根，即达到1 x 10^-6水平。 在我们实验的背景下，这一结果为研究玻色-爱因斯坦凝聚钾自旋混合物中的三体相互作用开辟了有趣的前景。 显示英文摘要

摘要： We demonstrate a simple magnetic field stabilization technique in a Bose-Einstein condensate experiment. Our technique is based on the precise measurement of the current fluctuations in the main magnetic field coils and amounts to their compensation using an auxiliary coil. It has the advantage of simplicity as compensation is done using a low inductance coil that can be straightforwardly driven at the relevant frequencies (1 kHz). The performances of the different components (power supply, current transducer, electronics...) are precisely characterized. In addition, for optimal stability the ambient magnetic field is also measured and compensated. The magnetic field stability around 57 G is measured by Ramsey spectroscopy of magnetic field sensitive radiofrequency transition between two spin states of potassium 39 and the shot-to-shot fluctuations are reduced to 64(7) $\mu$G rms, i.e. at the 1 x 10 -6 level. In the context of our experiment, this result opens interesting prospects for the study of three-body interactions in Bose-Einstein condensate potassium spin mixtures.