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In the laboratory frame, a positional superposition $\\vert x_1\\rangle+\\vert x_2\\rangle$ can quickly decohere whereas in the free-falling frame, as I argue, the superposition can survive for almost arbitrary long times. The paradoxical result is explained by the so far unappreciated feature of the proposed model: the centre of mass canonic"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1507.05828","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-07-21T13:31:08Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"38258508da7c9160abb35accfd8f3506d4aadaa44e0b9ccfe05fa591842ec297","abstract_canon_sha256":"58a69f5918d3b1d1ae56ce24566056acaed3f1cf23d8eabcd12963627b9ff69f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:33.233854Z","signature_b64":"Q2JPxcP0Z7DCq9nRpJgDt+P6xUGSJwqIivAFMT4BM6UtYGMtISRJYR8CXbiwCcNtXnFTb0hcsmcgqbGlRuv+DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b1f82081a351d109932e8ea791dcc7135448bb0008230cf15b582ee9f0208eb6","last_reissued_at":"2026-05-18T00:30:33.233048Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:33.233048Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Centre of mass decoherence due to time dilation: paradoxical frame-dependence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"quant-ph","authors_text":"Lajos Di\\'osi","submitted_at":"2015-07-21T13:31:08Z","abstract_excerpt":"The recently proposed centre of mass decoherence of composite objects due to gravitational time-dilation [Pikovski et al., Nat.Phys. 15. 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