{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"6819446f4fe6b76e953a9676f9c1d356e43d3d74cfc91f6864d6bd75c9c87bb8","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["b64ec7c0a829f8621b07772b25c87041f3d0b2696fa31986caee08a9a4006adc","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"04d5592808831b6fd6e1cd233fc283e9a1610bb1bf1f210e810f8adcbd0bfcd5","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.driven-dissipative.kpz-2d-condensate","kind":"well-posed","literature_status":"open","n":"2","parents":[],"plain":"A two-dimensional light-matter condensate that is constantly pumped and leaking was predicted to lose long-range coherence at very large distances, unlike an equilibrium superfluid. This prediction lacks a decisive experimental test.","posed_since":"2015","precise":"For a 2D driven-dissipative condensate described by a stochastic complex Ginzburg-Landau equation, phase dynamics maps to the compact KPZ equation, predicting algebraic order only up to a length $L*$ growing exponentially with the inverse nonequilibrium coupling (Altman, Sieberer, Chen, Diehl, Toner 2015). Is the loss of algebraic order beyond $L*$ observed in exciton-polariton condensates, and what replaces it (vortex-dominated disorder or a KPZ-roughened phase)? Answer yes or no, with the large-distance correlation form.","problem_ref":"b64ec7c0a829f8621b07772b25c87041f3d0b2696fa31986caee08a9a4006adc","references":"","settled_by":"Measurement of first-order coherence $g1(r, t)$ in a large uniform 2D polariton condensate showing the crossover from algebraic decay to KPZ or stretched-exponential scaling.","status_note":"$1\\mathrm{D}$ KPZ scaling of the condensate phase was observed in 2022 (Fontaine et al., Nature); a 2026 PRL (Misko, Starkova, Lagoudakis, doi:10.1103/z3ty-255t) reports KPZ physics in optically confined continuous condensates, and its bearing on the $2\\mathrm{D}$ question was not checked.","title":"Does KPZ physics destroy order in two-dimensional polariton condensates?","topic_ref":null},"content_withheld":"false","files":[],"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"9df439039d813cb29d184f78fdc7502c492c08ae1951fed2e43b7a5ce299fa40","schema":"pubphys.attested/1"},"id_token":null,"id_token_withheld":"false","envelope":{"attested_hash":"344189aec2188b3b3626359016474307659a931f7d683b434cd7876c2eb5ce73","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"YApg_-YcxQEIO84Rk0I_k81deXZX_CSaeJ8MbQwKPPUWyY4Ag9eU5Ej2IC-sB65VyuDydIRTx4gwROL-h_jcCA"},"schema":"pubphys.envelope/1"},"ots":{"attested":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEINEGJrsIYizs2JjWQFkdDB2Wakx99aDtDTNeHbC61znPwIDRVjXyfaceS8vmPInjXadbsM2Shmj9yv60jtwbpgYxYCPEgUQQFW2W4kMpikuYbUuAcrrHE-phdsn2tbhOZnI5OEdUI8SBjpKytjV-M0VkD5oUnPL8l5N0Zu9uov5ea_zVdpv2kZgjxIDwSCm9mb4SC_zAIexCWlTeA8oyREBbfIZEcrNwGl2V_CPEgp-4f12ttXV9INMx6M9KUy_p-WqYRaBkIkZZp_cCFieQI8SCF20PF3d9YpXmw012QE94VYZkPnoUIwyF2Pq0nRaL_hAjwIEy6JN28xxcmaT8U-CrGm2ycCSQBCZNWkpcJmM3XNqJ2CPEgET84erh4QMqfDxFWGLBJaZS5EYFN7oYAm7iWbswJgxQI8CDsCcIzBovmyR1v7IXhYg1Z7m0X4dWZvLS_NU94HSk3sQjxIJdQdDsL3v2lA7qZb8kMJtOgaTQmbgchdPcS5lYJqDLnCPAgkPXX-naXR0fRIdS-sEDlzYmtMvSCNH42ESUF0QXb6NUI8CDQo_sIWZiWXaTGRSQBLmU-lHJKskYKqsjO1r02DhB8LAj_8Ajn9YmozHwo9QjwEJ46aM9ZDv3TdtqV3ZbRsNgI8SBOF8pILGf1kodr5MKmQs6Cd93joraGn3g6UPt_-kewPwjwIOG-gmM7bd_eR4AiDMNfluS3xvr7vicLR-sCBr5qtG2cCPAgrVNFrCoeQcCxhlmnE0BzHgR8HQpZAlfqzDDFzfWb8GUI8QRq0WWT8AjZJ2cF_c7k8ACD3-MNLvkMjiwraHR0cHM6Ly9ib2IuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZ_AI9ZMS1zxd7IEI8BDd00WgJZ0RncsC1Fyai_4aCPEgvxMFrnu7F05IW5INiraQ3OVEYMjNx6JfBxw1Q4jPLi4I8QRq0WWS8Ag2zxPAtI5JsP8Ag9_jDS75DI4uLWh0dHBzOi8vYWxpY2UuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZwjxIHAnv4KFFf4uiYEFJvLxiMxSyz8VowJP4roTfDD9h7bICPAgj5tgvbNF7mxSP4jGGE66ezUFRLnI4g1VTkvuV4VtCPAI8CCxlc1HuKORuHgn7DYIYcDhc4oo99OkTWBEvddBypoa7AjwIFcjjaF8kDNDYCZGaNISlRjvX-I7in-QNwsr4JYQbFJvCPAgnl0k4gs7LuY5i1umiHO-J7My3uBThLJUWQoY9LdVSrQI8SA6-Ft11_K_GqMNWYhkVsVqCFvXSYbp4S8JoLsLBnUzvgjxIBC8_mAE7JBP35SNxDBcG7joLJwURpMxdV2vSO64_jEOCPEge04Coj1xSi7CE8UwqiBGNhPyZ5QdD_YZwn-heSdObU4I8SBgdDSgr3VUx1j8m_pK7-OzMwwFgXeLy43ujffCv-hf5AjwIMl-PnAt4xjoBEVU4-nkyN0NKRa9AvX4kEMfllFyIJS9CPFZAQAAAAHz4rV-uwQFg02bVnEMUFgpIdGKjM4tWuID1kTVnrjisAAAAAAA_v___wJURAIAAAAAABYAFBFys2oc0-U-bYrC3VulGLzND5fbAAAAAAAAAAAiaiDwBHLTDgAICPEgMJIBYi46xOIuFDwzJ9nOx14ngW5HbglUf65ORpkoIYcICPAgHgGWEGCDHWgscwT92NOoJ7s-ezbPkyiWr2RnYZDC_dwICPAgtffMyyLu-MscJsDc0dzwGspwSrrmvVAnMNgsgWhHClgICPAgMUl1OfBDUwhp5VZjHwVA0nuz1F5HZTUJCHAnM1L1F3MICPAgStK7UWpnrUueV5EaE7uE0y6BLMp6EANmrbhrTqEBZu8ICPAg5LVW7IHtUL5mNOvPx1hOTfLMmqlQ7t9EFW-KDtrISIQICPAgABgXZ6upFU8qiDQKFtQFpqkjKwl0PsxM4JUjVLlDKbkICPAgEwb96FiOhjlbwI8GFZQ4a5GXwxs4bUdqVOMKrtBWV30ICPEgqBg-wp0c8CAPV9k6J7wIa9_GtQfpWmhpE1zqFZyi2pQICPAg2pZLTVPGJbriiz0UhMytYDVYAXOgQnWDcrMOewK9O8cICPEgxm3QwzbvT4siJzubQGnST67bWv-exYwSPP1KDi7CaUwICPEgm6udUudfjUaM0gUFTylKGDMypj7ptMTG0zmxd_T5yTcICPAgMpOInkjFCVp1pOZhfZnyPAl8hdWGmHzQcrGLgLwSKLgICAAFiJYNc9cZAQPzpjs"],"envelope":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEI5dGyM3dTMRbEgAHjWzVc72P8a7IsmfRMz1Cpv1_olS7wIOXSr_SfPrwub5ysE0vPu0vtrC77ZC3nUOioFUA_Q6BBCPEgirUcg5wU19gIOYbVtGaBHNAiiivY_-ZlZdfwdenFWxkI8CDUssjr2Ignw5gO84f0V7QSUHSyFtOlFeKewN3csBK4pgjxIIg7vtNphMdAYj4wFme1vzs2Y6EdAWc0m1K_WX0YHRaSCPEgdayLVnRF4ZlbD5apG18BdPNir3oMLFZeCan2o0Zd_GcI8SDwW0n86vigW9CbepvAF6FYQh2iSNI3v71Lz1u2jm08fwjwIHC3tgZkh9d6i8bVkes2XGuLF6732dXAKootPWSnCaG0CPEgOu1BrS8CJLOSHlpJKWFG_eoQpmwos6QhE5Dl0ETf3NkI8SCRZP0ctidqGb7ZjgNGhZ1hJpAMc97VLUvI8DuO4xChLwjxID89HsXrUag9eRv04qSQX18D2ak5pxDN4H8m3_0Qkp84CPAg3mczMYDKOd7Nhf3ojA9ZvuTsN66Y1NnyYTp9j8GKQNwI8SCvAiiN-Hrv7IEejd8wdUihoozu5KOvpoBFJ0vg3UnGAQj_8Ajn9YmozHwo9QjwEJ46aM9ZDv3TdtqV3ZbRsNgI8SBOF8pILGf1kodr5MKmQs6Cd93joraGn3g6UPt_-kewPwjwIOG-gmM7bd_eR4AiDMNfluS3xvr7vicLR-sCBr5qtG2cCPAgrVNFrCoeQcCxhlmnE0BzHgR8HQpZAlfqzDDFzfWb8GUI8QRq0WWT8AjZJ2cF_c7k8ACD3-MNLvkMjiwraHR0cHM6Ly9ib2IuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZ_AI9ZMS1zxd7IEI8BDd00WgJZ0RncsC1Fyai_4aCPEgvxMFrnu7F05IW5INiraQ3OVEYMjNx6JfBxw1Q4jPLi4I8QRq0WWS8Ag2zxPAtI5JsP8Ag9_jDS75DI4uLWh0dHBzOi8vYWxpY2UuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZwjxIHAnv4KFFf4uiYEFJvLxiMxSyz8VowJP4roTfDD9h7bICPAgj5tgvbNF7mxSP4jGGE66ezUFRLnI4g1VTkvuV4VtCPAI8CCxlc1HuKORuHgn7DYIYcDhc4oo99OkTWBEvddBypoa7AjwIFcjjaF8kDNDYCZGaNISlRjvX-I7in-QNwsr4JYQbFJvCPAgnl0k4gs7LuY5i1umiHO-J7My3uBThLJUWQoY9LdVSrQI8SA6-Ft11_K_GqMNWYhkVsVqCFvXSYbp4S8JoLsLBnUzvgjxIBC8_mAE7JBP35SNxDBcG7joLJwURpMxdV2vSO64_jEOCPEge04Coj1xSi7CE8UwqiBGNhPyZ5QdD_YZwn-heSdObU4I8SBgdDSgr3VUx1j8m_pK7-OzMwwFgXeLy43ujffCv-hf5AjwIMl-PnAt4xjoBEVU4-nkyN0NKRa9AvX4kEMfllFyIJS9CPFZAQAAAAHz4rV-uwQFg02bVnEMUFgpIdGKjM4tWuID1kTVnrjisAAAAAAA_v___wJURAIAAAAAABYAFBFys2oc0-U-bYrC3VulGLzND5fbAAAAAAAAAAAiaiDwBHLTDgAICPEgMJIBYi46xOIuFDwzJ9nOx14ngW5HbglUf65ORpkoIYcICPAgHgGWEGCDHWgscwT92NOoJ7s-ezbPkyiWr2RnYZDC_dwICPAgtffMyyLu-MscJsDc0dzwGspwSrrmvVAnMNgsgWhHClgICPAgMUl1OfBDUwhp5VZjHwVA0nuz1F5HZTUJCHAnM1L1F3MICPAgStK7UWpnrUueV5EaE7uE0y6BLMp6EANmrbhrTqEBZu8ICPAg5LVW7IHtUL5mNOvPx1hOTfLMmqlQ7t9EFW-KDtrISIQICPAgABgXZ6upFU8qiDQKFtQFpqkjKwl0PsxM4JUjVLlDKbkICPAgEwb96FiOhjlbwI8GFZQ4a5GXwxs4bUdqVOMKrtBWV30ICPEgqBg-wp0c8CAPV9k6J7wIa9_GtQfpWmhpE1zqFZyi2pQICPAg2pZLTVPGJbriiz0UhMytYDVYAXOgQnWDcrMOewK9O8cICPEgxm3QwzbvT4siJzubQGnST67bWv-exYwSPP1KDi7CaUwICPEgm6udUudfjUaM0gUFTylKGDMypj7ptMTG0zmxd_T5yTcICPAgMpOInkjFCVp1pOZhfZnyPAl8hdWGmHzQcrGLgLwSKLgICAAFiJYNc9cZAQPzpjs"]},"log":{"leaf_index":"2770","tree_size":"3804","proof":["9c95972b822d951aaf38a4a4b67e651b4c22fe199130b85848653dc75fabf577","44646eaa4f8e32a7d8bd23a0968f56276e4a2f114d67af947fbe19ca61f9620b","0ebbf069b19d125a19a23cb8a3a551842479c8a699d0feb07e013842261e6232","aa182b86cceeab61f4cb11d794cd59b24fafa3ae1fcf961bdffc0b3fe8196f89","d750aa2115ce2c1f5d8149b6da1765c6a9aa9889fd9fa22f14bb1b73b5827fc1","f3f6eae850dca5fc8ba586b2ee55797c02b78f49010455158b6e75788b98169b","4e30cd04a4d17da6f4cb94b533f103f36615770fb4ea7efa838766f685caf048","be758823123efe95d86a912db94fd4ffa5f7f16fd3feb7f5931c6aa849420fa0","c5dbfd47d4733f672f10a08c156fed0942802569cf36e89d6af3957344f7d18d","b0b232078d071c92816af6274529aef23a2ea1f41246694fec32d768cfa09dc8","325287f5a43e4f3ad4072ec4bd53d43c50c1393021a056122e9cb0fad83b868f","3c578dccc15502c5f3efe228cadc99fee76ab536ed01f66b14d316fdcc157429"],"checkpoint":"pubphys.com/log/v1\n3804\nAK6t4qgu96+M9wScTrIlsJ10d/zhKVEtYguyM3aeJvo=\n\n— pubphys.com/log/v1 JFPwIPP8EtoxgcsQg7V7CwIdL4UKPqJtpv+eB8sFNJjyQHIdyA1VabmBsPyLqq2bLxJPn57rA6fQi8y0QDDjRXHvlQg=\n","promise":"pubphys.com/log/v1 promise\ncd9d36f717b73cff2a6fc104bf553fddd33c3cacffaf5547581effa2ddb997a7\n2770\n2026-10-15T23:43:57Z\n2026-10-16T01:43:57Z\n\n— pubphys.com/log/v1 JFPwIEsKVY3ZLnINEh3EzpUD5CNn9BSD+zecfJjCZJ+bjEx6c8QeQK0zfknWSb98qAgISsTdz1qv80a6yN1Tz1eeKws=\n"},"orcid_key_evidence":[],"attesting":null}