 The paper proposes a compact detector for spacetime metric and curvature using quantum spatial superpositions of mesoscopic objects. The proposed form for the detector is analyzed, and it is found that its nonsymmetric construction and large mass enable the detection of gravitational waves, GWs. The construction of such a detector is in principle possible with state-of-the-art techniques, while taking into account known sources of decoherence and noise. The paper identifies mitigation mechanisms for these sources, and shows that it could potentially lead to a meter-sized, orientable, and vibrationally resilient GW detector. This article was authored by Ryan J. Marshman, Anupama Zumda, Gavin W. Morley, and others.