论文标题
带有纺纱玻璃纤维的腔体增强磁力计
Cavity-enhanced magnetometer with a spinor Bose-Einstein condensate
论文作者
论文摘要
我们提出了一种基于横向驱动的多组分玻色酿凝结物的新型复合光磁力计，该磁力仪与线性腔的两个不同的电磁模式结合在一起。在临界泵强度之上，由外部磁场引起的冷凝物的种群失衡的变化需要两种腔模式的相对光子数的变化。因此，监测腔输出场可以实时对磁场进行无损测量。我们表明，所提出的磁力计的灵敏度相对于原子数表现出Heisenberg样缩放。对于最先进的实验参数，我们计算了这种磁力计的敏感性的下限，其ft/$ \ sqrt {\ mathrm {hz}} $ - pt/$ \ sqrt {\ sqrt {\ sqrt {\ mathrm {hz}} $ condense $ condense consoss of $ 10^4 $ tipe conderence conderence of 10^4 $ tipe conterence conderence of Condemente conterence of 10^4 $ tise ass conterence。
We propose a novel type of composite light-matter magnetometer based on a transversely driven multi-component Bose-Einstein condensate coupled to two distinct electromagnetic modes of a linear cavity. Above the critical pump strength, the change of the population imbalance of the condensate caused by an external magnetic field entails the change of relative photon number of the two cavity modes. Monitoring the cavity output fields thus allows for nondestructive measurement of the magnetic field in real time. We show that the sensitivity of the proposed magnetometer exhibits Heisenberg-like scaling with respect to the atom number. For state-of-the-art experimental parameters, we calculate the lower bound on the sensitivity of such a magnetometer to be of the order of fT/$\sqrt{\mathrm{Hz}}$--pT/$\sqrt{\mathrm{Hz}}$ for a condensate of $10^4$ atoms with coherence times of the order of several ms.
