原子芯片喷泉重力仪

Atom-Chip Fountain Gravimeter.

作者信息

Abend S, Gebbe M, Gersemann M, Ahlers H, Müntinga H, Giese E, Gaaloul N, Schubert C, Lämmerzahl C, Ertmer W, Schleich W P, Rasel E M

机构信息

Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany.

ZARM, Universität Bremen, Am Fallturm, D-28359 Bremen, Germany.

出版信息

Phys Rev Lett. 2016 Nov 11;117(20):203003. doi: 10.1103/PhysRevLett.117.203003.

DOI:10.1103/PhysRevLett.117.203003

PMID:27886486

Abstract

We demonstrate a quantum gravimeter by combining the advantages of an atom chip for the generation, delta-kick collimation, and coherent manipulation of freely falling Bose-Einstein condensates (BECs) with an innovative launch mechanism based on Bloch oscillations and double Bragg diffraction. Our high-contrast BEC interferometer realizes tens of milliseconds of free fall in a volume as little as a one centimeter cube and paves the way for measurements with sub-μGal accuracies in miniaturized, robust devices.

摘要

我们通过结合原子芯片在自由下落玻色-爱因斯坦凝聚体（BEC）的产生、δ 脉冲准直和相干操纵方面的优势，以及基于布洛赫振荡和双布拉格衍射的创新发射机制，展示了一种量子重力仪。我们的高对比度 BEC 干涉仪在小至 1 立方厘米的体积内实现了数十毫秒的自由落体，为在小型化、坚固型设备中实现亚微伽精度的测量铺平了道路。