{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"1c79857e9736b434ddb357a0f89b839ebb5c7ea803de8c2d54d189e66340eec0","created":"2026-10-03T07:18:09Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"3723dde5b204357e39112e7ed1f943af5fb0864084e73ffa91976c86c9755ea6","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":[],"external_id":"qft.positive-geometry.ds-massless-correlators","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"A geometric shape, the cosmological polytope, gives the quantum state of the early universe for a simple toy field. Extending it to the fields that matter, such as massless particles and gravitons in an expanding universe, is open.","posed_since":"","precise":"The cosmological polytope (Arkani-Hamed, Benincasa, Postnikov, 2017) gives wavefunction coefficients of conformally coupled scalars with polynomial interactions in flat space and FRW backgrounds as canonical forms. Find a positive geometry whose canonical form gives tree-level wavefunction coefficients or in-in correlators of massless minimally coupled scalars or gravitons in de Sitter space.","problem_ref":null,"references":"","settled_by":"An explicit geometry reproducing the known four-point graviton or massless-scalar de Sitter wavefunction coefficients.","status_note":"","title":"Positive geometry for de Sitter correlators of massless fields","topic_ref":"cd9a4680d5f7ad1dcd63b8f904c4272d3e5ac40ad4be46888c8f43e407804d79"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"1c10584c8f58620f03d5e445ad208f0552701044a11d53c25865d315e05af2ed","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"73abf512a4bd1ae0bb0f0f9e0cdf600ffbce7fe7bc5395b5c177573713306634","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"6EEVuHuOHcJ4h0wLMzNzbgpsD6q5-V9nYYIImMqxXzulKrrgh96OxutBjB3sPOCSzaZ_Rq3_3QSe86Rsy2WkCQ"},"schema":"pubphys.envelope/1"},"record_hash":"1c10584c8f58620f03d5e445ad208f0552701044a11d53c25865d315e05af2ed","leaf_index":1935}