{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"0797765ad4b561702854767ecd88333a16161a6abff45be6a387fd99425e4100","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":["ai:gpt-5.5"],"kind":"seed"},"parents":["685f9b8c875eff20e5a6b04f0df8911c92de091ff9ce3fd61b2dec769536d0da","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"86678f0ad0609edb53bfedcfa34bdbbb97023c8fb72af49a3877938c6d7217b5","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":["ai:gpt-5.5"],"external_id":"stat.kpz-higher-d.experiment-2plus1","kind":"well-posed","literature_status":"partially-resolved","n":"2","parents":[],"plain":"One-dimensional KPZ laws have been seen in liquid-crystal turbulence and in fluids of light, while two-dimensional tests exist only for flat growing films. A clean experiment in another geometry or system would measure the full statistics of a growing two-dimensional surface or its analog, not only its exponents.","posed_since":"","precise":"Measure, in a $2+1$ dimensional KPZ system other than flat thin-film deposition (curved or stationary initial geometry, or the phase of a 2D driven-dissipative condensate), the one-point distribution of $\\chi$ and the spatial and two-time correlation functions, and compare them with simulated universal functions for that geometry (exponents $\\alpha \\text{ approximately } 0.39, z \\text{ approximately } 1.61$).","problem_ref":"685f9b8c875eff20e5a6b04f0df8911c92de091ff9ce3fd61b2dec769536d0da","references":"","settled_by":"A measurement whose distribution of $\\chi$, including skewness and kurtosis, and whose two-time correlations agree with simulations for the matching geometry within experimental error.","status_note":"Height distributions matching 2+1 KPZ simulations were measured in CdTe thin films (Almeida, Ferreira, Oliveira, Aarao Reis, Phys. Rev. B 89, 045309, 2014); a 2025 exciton-polariton experiment reported 2D KPZ scaling of phase correlations (arXiv:2506.15521); curved and stationary geometries and two-time statistics remain untested.","title":"Measuring 2+1 KPZ statistics beyond flat thin-film growth","topic_ref":null},"content_withheld":"false","files":[],"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"c3c88b35faa8060195570d9697e2cc204765725977853f9b32a96f09aef8a222","schema":"pubphys.attested/1"},"id_token":null,"id_token_withheld":"false","envelope":{"attested_hash":"83c4b49c6c1fa0492dbc3607db5b3f0c4030d2bd49eaf3390b247b213e0b2119","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"xchREfCheTyXZlvc8iVrWfZtSsIrnmyFB15O_8c77uIndJ4nyqAzmA6M_URsZimBOkiFy8F5mMBPS0h1u75FCw"},"schema":"pubphys.envelope/1"},"ots":{"attested":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEIg8S0nGwfoEktvDYH21s_DEAw0r1J6vM5CyR7IT4LIRnxIIO-6RasPuk3yYOl-XT6BhOqh0y3ThjcrNFTR5KhRpLrCPEgM6noGwjpX_WzqnkyD8SWWgrbzb6n2BKzMiE7C6JkWiAI8SBi63_bdO8z1rZbmHhIshpplUvCJbkTjatQ-b4NJ6zgzAjxIBBhTxwg3GjFOSJqoNYyqGEurMEykCKueYGxPc-zihUCCPEgeOrHTu6O7u6fDPXKCLHYj0WxGeH64uFrFzpz5nRb66wI8CBGhQttzGNKBcHwTYm54HtQaQHe2dN-Bc40mXhRhUdChwjxIPRhXPPRn9t_0pTcbytoMJBVk7mE9_Tea-UWMyx91Sd_CPEgC07znjc0bVDgPzONkw3aBXeRFcSLeM3BhuNQIWI6mKkI8CCCFfNrg2ZeB51PNa84j-z6Sin0AxT6aP9r7HupgUKbMwjxICknnLxa8xs8qmAdhtb0NnANbtwYyrlRTgqcMVLLl8ogCPEgHd9u6OIGCvUV12A1B1xdiOprSJ-4w0cqwfe7CzVX5HsI8CDQo_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_ieLohOiSlAEIEOcR7Lwd2US3uF6EKJHV9PMaLfeUew2P3bAjh5bzVPDwIBDwPGhJsAVEp6XN40wscgXnqjq_vR3eCXCxsGL4bw2wCPEg8tDkNQDTfg11Ts6zcN9XDcaTCRAAe9ruG2bEay0JLGQI8CB7sQbZQD1WNO-FbY5cCny81wHgE6fwh8huPSOKjG1eWgjwIA4l_fIOYDPSP7zBLiLV7epM2kiCRaq00xItStiAB4IZCPAg76F86BBDYFN7i0Z1hSfs2OGM6Xl2KJT0_uR5zkq51J4I8SCxPzWn869O0g7dbPeNGPp48oUUd-MQs-qTcF59d-kNywjxIB_8Nt5kaeAHJG1qp3MI751xQRro8K9q_v7kKdgv48GqCPEgtFEK0VubfP67YUyPihYaN9dTg9fCnso7LYYm40h86RMI8CBUfn8vND_FHy1q8eURvKLesQojCPxZvV5RtrwTxl9iVwjwIKD8mGRUgbk2Dt1xG-4OxMpCuw1ya5UEUQXsqASURGCtCPAgkPXX-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"]},"log":{"leaf_index":"3784","tree_size":"3804","proof":["dad53b884c84766eee918d9995824971d2e2b86cb3b7b9df05126a652c765f0d","7f27fabec296f1e548897335c4fe9f6b8dffd52062a51e9218e20ea775ca5239","05d50eaeafebe34a2876773e81b0dfd5db25094ce3c360d39bb1b5695264260d","a83777ca3d084250962d0c4d7a4e3411fc38ce51128ee0c5c26b3f9a3336fe98","60f25ebb90384640af326cc2873d526325852029e565fc4c54ecff035fe25eaf","975719c7e737240114d6e59660f0cf9fe5b925c1e48f34ce3eac294dd476d8da","0455d4faa8c1028929d27c21062fe4bb47127ac22b5867e956f5c4f72c680cf1","e55158332fc5066d8199fad50d3929c561e805c1a4826619f59cd2254d322eb8","af34d80d0065c0ab502282775e865492e2cb49c9493f4594d63ba5577922854a","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\n1a9eda463f0239a7d4d92d66256f76e112513f49787b95745f1d8291b4e8557e\n3784\n2026-10-15T23:43:57Z\n2026-10-16T01:43:57Z\n\n— pubphys.com/log/v1 JFPwIO94ko/8wdvB9UUuFkAymPApbaiNFcIMwypEIBDgqh7rXjSQBQnZMgLsAr3+n4Rsa/1oy1Ekb1WQuFUEOAVJcAI=\n"},"orcid_key_evidence":[],"attesting":null}