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This lecture by Lin-Qing Chen from IQOQI Vienna explores quantum effects in gravity that go beyond the Newton potential using delocalised quantum sources. Discover how recent advances in table-top experiments could demonstrate that gravity is incompatible with classical descriptions. Learn about two significant effects that overcome the limitations of current experimental proposals: the interaction between generic quantum sources of gravity that cannot be reproduced with the Newton potential or known classical gravity theories, and the quantum commutator between the gravitational field and its canonically conjugate momentum appearing as an additional term in relative phase measurements. Understand why identifying stronger quantum aspects of gravity beyond those reproducible with the Newton potential is essential for proving gravity's nonclassicality and designing next-generation experiments that test quantum aspects of gravity more comprehensively than current proposals.
