Assist. Prof. Dr. Marko Toroš (FMF): Quantum gravity in the laboratory

Testing the quantum nature of gravity represents one of the major open problems in modern experimental physics. However, the next generation of matter-wave interferometry with nanoparticles might finally open the possibility for the first experimental test using results from quantum information theory. In this talk, we will review the key theoretical and experimental milestones that are converging toward the first test of the elusive quantum-gravity interface. The proposed test uses neutral nanoparticles with embedded spins enabling Stern-Gerlach interferometry. The experiment will test whether gravity is capable of generating quantum entanglement and Bell nonlocality, a result that would constitute a major experimental breakthrough and would provide the first experimental evidence for quantum gravity. We will briefly review the current experimental capabilities for controlling and manipulating the quantum states of nanoparticles, followed by a long-term roadmap for executing the proposed experiment. Beyond its fundamental significance, carrying out the test will push the frontiers of quantum sensing and the broader quantum-technology landscape.
Cookies, tea