A transportable quantum gravimeter employing delta-kick collimated Bose–Einstein condensates Nina Heine, Jonas Matthias, Maral Sahelgozin, Waldemar Herr, Sven Abend, Ludger Timmen, Jürgen Müller and Ernst Maria Rasel Eur. Phys. J. D, 74 8 (2020) 174 Published online: 25 August 2020 DOI: 10.1140/epjd/e2020-10120-x