{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"3da056665a6ede18f24b67d704781d52c4cf356c367dac5c7e5772d29a392622","created":"2026-10-03T07:17:59Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"e63ce0f54724f21f4a2abecc891ef9f191d49b20589d00ce2852c4aacbbacade","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"cm.helium3-quantum-solids.slab-modulated-phase","kind":"well-posed","literature_status":"contested","n":"1","parents":[],"plain":"When helium-3 is confined in a slab about one ten-thousandth of a centimeter thick, theory predicts a superfluid phase whose order varies periodically along the slab, like stripes. Experiments disagree on whether this phase exists and what form it takes.","posed_since":"2007","precise":"In $3\\mathrm{He}$ confined to slabs of thickness $D \\sim 1e-4\\,\\mathrm{cm}$ with pair-breaking walls, quasiclassical theory predicts a stripe phase (Vorontsov and Sauls 2007) of periodic domain walls in a planar-distorted B order parameter, between the A and B phases. Determine whether a modulated phase exists, its period and its region in $\\left(D, P, T\\right)$, and distinguish a stripe phase from a pair-density-wave state and from a polar-distorted B phase with pinned domain walls. An answer is a phase diagram with direct evidence of the modulation.","problem_ref":null,"references":"","settled_by":"NMR line shapes or flow measurements in slabs of several thicknesses whose features match the predicted modulation period and its D dependence.","status_note":"NMR in a 1.1e-4 cm slab (Levitin et al. 2019) gave evidence for a stripe phase; a nanofluidic resonator experiment (Shook et al. 2020) claimed a pair-density-wave state, and a 2020 Comment by Levitin et al. disputed that interpretation.","title":"Spatially modulated superfluid phase of 3He in thin slabs","topic_ref":"16fbf45f3606bcc2e9eb1edee75f8360d28657af82c155c213da344ce6ff8cd5"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"217bbcb15686a63641ddaae92d0d43bda4e71f4138cecb2fe76ea79f1cba4fa6","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"6707bbf75346f2b4f3d8e279a6ffa22bfe3e5c4fa0ba310d2900ab66e1b81c8e","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"sKe4HnqKmV3bj214i-WB_t8id9hbRotdxkhB_SY6NMKlDF4B7aJGx1Hm96kzgPMaoz9s7Z8QNT0do4nxReSbCg"},"schema":"pubphys.envelope/1"},"record_hash":"217bbcb15686a63641ddaae92d0d43bda4e71f4138cecb2fe76ea79f1cba4fa6","leaf_index":1022}