Superconducting electro-mechanics to test Diósi-Penrose effects of general relativity in massive superpositions

Abstract

Attempting to reconcile general relativity with quantum mechanics is one of the great undertakings of contemporary physics. Here we present how the incompatibility between the two theories arises in the simple thought experiment of preparing a heavy object in a quantum superposition. Following Penrose's analysis of the problem, we determine the requirements on physical parameters to perform experiments where both theories potentially interplay. We use these requirements to compare different systems, focusing on mechanical oscillators which can be coupled to superconducting circuits.

arXiv commentarXiv admin note: text overlap with arXiv:2004.09153

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• Degeneracy-breaking and Long-lived Multimode Microwave Electromechanical Systems Enabled by Cubic Silicon-Carbide Membrane Crystals
• Fast Generation of High-Fidelity Mechanical Non-Gaussian States via Additional Amplifier and Photon Subtraction
• Phonon-number resolution of voltage-biased mechanical oscillators with weakly-anharmonic superconducting circuits
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• Strong Intrinsic Longitudinal Coupling in Circuit Quantum Electrodynamics
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• Mesoscopic Quantum Thermo-mechanics: a new frontier of experimental physics
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• Quantitative calibration of a TWPA applied to an optomechanical platform
• Emergent Bell Phase in an Electro-Nanomechanical Quantum Simulator