{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:ULPWKCGTO2TY63IOJC62WQJTEG","short_pith_number":"pith:ULPWKCGT","schema_version":"1.0","canonical_sha256":"a2df6508d376a78f6d0e48bdab413321aa4c6c0b0f1c6da029114a4cdf5a561e","source":{"kind":"arxiv","id":"1811.05047","version":2},"attestation_state":"computed","paper":{"title":"Monte Carlo simulation of cosmologies with dust","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th","physics.comp-ph"],"primary_cat":"gr-qc","authors_text":"Masooma Ali, Syed Moeez Hassan, Viqar Husain","submitted_at":"2018-11-12T23:42:13Z","abstract_excerpt":"The quantum theory of the Friedmann cosmological model with dust and cosmological constant ($\\Lambda$) is not exactly solvable analytically. We apply Path Integral Monte Carlo (PIMC) techniques to study its quantum dynamics using the physical Hamiltonian corresponding to the dust field as a clock. We study (i) quantum fluctuations around classical paths and (ii) formulate the analogues of the no-boundary and tunnelling proposals and simulate the ground state wave functions. For $\\Lambda < 0$ a unique ground state wave function exists. For $\\Lambda > 0$ the physical Hamiltonian is not bounded b"},"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":"1811.05047","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-11-12T23:42:13Z","cross_cats_sorted":["hep-th","physics.comp-ph"],"title_canon_sha256":"f315769ae46761ea19413096c8fcb9aad9c0dd28146e8ba5d815ea07912d70a7","abstract_canon_sha256":"47e6a7355db74cf0f99ee31cbdde346d43bd894e4a15b0f66a18498163df1c96"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:34:03.734125Z","signature_b64":"S00owaJjlWRw5LPgigquXsXrbXG9EhTgAjukRuGeVkGadXnWS1lFPlRCqE75vTCMr8Jorxe45N1iTfPGPIerCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a2df6508d376a78f6d0e48bdab413321aa4c6c0b0f1c6da029114a4cdf5a561e","last_reissued_at":"2026-07-05T01:34:03.733696Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:34:03.733696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Monte Carlo simulation of cosmologies with dust","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th","physics.comp-ph"],"primary_cat":"gr-qc","authors_text":"Masooma Ali, Syed Moeez Hassan, Viqar Husain","submitted_at":"2018-11-12T23:42:13Z","abstract_excerpt":"The quantum theory of the Friedmann cosmological model with dust and cosmological constant ($\\Lambda$) is not exactly solvable analytically. We apply Path Integral Monte Carlo (PIMC) techniques to study its quantum dynamics using the physical Hamiltonian corresponding to the dust field as a clock. We study (i) quantum fluctuations around classical paths and (ii) formulate the analogues of the no-boundary and tunnelling proposals and simulate the ground state wave functions. For $\\Lambda < 0$ a unique ground state wave function exists. For $\\Lambda > 0$ the physical Hamiltonian is not bounded b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.05047","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1811.05047/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1811.05047","created_at":"2026-07-05T01:34:03.733773+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.05047v2","created_at":"2026-07-05T01:34:03.733773+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.05047","created_at":"2026-07-05T01:34:03.733773+00:00"},{"alias_kind":"pith_short_12","alias_value":"ULPWKCGTO2TY","created_at":"2026-07-05T01:34:03.733773+00:00"},{"alias_kind":"pith_short_16","alias_value":"ULPWKCGTO2TY63IO","created_at":"2026-07-05T01:34:03.733773+00:00"},{"alias_kind":"pith_short_8","alias_value":"ULPWKCGT","created_at":"2026-07-05T01:34:03.733773+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG","json":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG.json","graph_json":"https://pith.science/api/pith-number/ULPWKCGTO2TY63IOJC62WQJTEG/graph.json","events_json":"https://pith.science/api/pith-number/ULPWKCGTO2TY63IOJC62WQJTEG/events.json","paper":"https://pith.science/paper/ULPWKCGT"},"agent_actions":{"view_html":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG","download_json":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG.json","view_paper":"https://pith.science/paper/ULPWKCGT","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.05047&json=true","fetch_graph":"https://pith.science/api/pith-number/ULPWKCGTO2TY63IOJC62WQJTEG/graph.json","fetch_events":"https://pith.science/api/pith-number/ULPWKCGTO2TY63IOJC62WQJTEG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG/action/storage_attestation","attest_author":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG/action/author_attestation","sign_citation":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG/action/citation_signature","submit_replication":"https://pith.science/pith/ULPWKCGTO2TY63IOJC62WQJTEG/action/replication_record"}},"created_at":"2026-07-05T01:34:03.733773+00:00","updated_at":"2026-07-05T01:34:03.733773+00:00"}