Research campaign : macroscopic quantum resonators (MAQRO)

Kaltenbaek, Rainer and Arndt, Markus and Aspelmeyer, Markus and Barker, Peter F and Bassi, Angelo and Bateman, James and Belenchia, Alessio and Bergé, Joel and Braxmaier, Claus and Bose, Sougato and Christophe, Bruno and Cole, Garrett D and Curceanu, Catalina and Datta, Animesh and Debiossac, Maxime and Delić, Uroš and Diósi, Lajos and Geraci, Andrew A and Gerlich, Stefan and Guerlin, Christine and Hechenblaikner, Gerald and Heidmann, Antoine and Herrmann, Sven and Hornberger, Klaus and Johann, Ulrich and Kiesel, Nikolai and Lämmerzahl, Claus and LeBrun, Thomas W and Milburn, Gerard J and Millen, James and Mohageg, Makan and Moore, David C and Morley, Gavin W and Nimmrichter, Stefan and Novotny, Lukas and Oi, Daniel K L and Paternostro, Mauro and Riedel, C Jess and Rodrigues, Manuel and Rondin, Loïc and Roura, Albert and Schleich, Wolfgang P and Schuldt, Thilo and Stickler, Benjamin A and Ulbricht, Hendrik and Vogt, Christian and Wörner, Lisa (2023) Research campaign : macroscopic quantum resonators (MAQRO). Quantum Science and Technology, 8 (1). 014006. ISSN 2058-9565 (

[thumbnail of Kaltenbaek-etal-QST-2023-Research-campaign-macroscopic-quantum]
Text. Filename: Kaltenbaek_etal_QST_2023_Research_campaign_macroscopic_quantum.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo

Download (624kB)| Preview


The objective of the proposed macroscopic quantum resonators (MAQRO) mission is to harness space for achieving long free-fall times, extreme vacuum, nano-gravity, and cryogenic temperatures to test the foundations of physics in macroscopic quantum experiments at the interface with gravity. Developing the necessary technologies, achieving the required sensitivities and providing the necessary isolation of macroscopic quantum systems from their environment will lay the path for developing novel quantum sensors. Earlier studies showed that the proposal is feasible but that several critical challenges remain, and key technologies need to be developed. Recent scientific and technological developments since the original proposal of MAQRO promise the potential for achieving additional science objectives. The proposed research campaign aims to advance the state of the art and to perform the first macroscopic quantum experiments in space. Experiments on the ground, in micro-gravity, and in space will drive the proposed research campaign during the current decade to enable the implementation of MAQRO within the subsequent decade.