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In the regime of inter-species repulsion $U^{ab}$ larger than the intra-species repulsion $U$, they found a transition from a uniform miscible phase to phase-separation occurring at a finite value of $U$ , e.g., at around $U = 1.3$ for $\\Delta = U^{ab}/U = 1.05$ and $\\rho_{a} = \\rho_{b} = 1/2$. In this comment, we show that this result is not correct and in fact the two-component Bose-Hubbard model is unstable to phase-separation for"},"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":"1403.4650","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-03-18T23:53:41Z","cross_cats_sorted":[],"title_canon_sha256":"37e16f10e02af066a97ea54a56808654afc5223fe58877716db3cc2ce0859c69","abstract_canon_sha256":"d5dd4604ccc492e82831f5bb21a8fd9508e1b31738c13c79a3689a0d16cae8e8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:52:33.817625Z","signature_b64":"YYa6zUSR0P3wayF6F6W8EqMPrMkc9wuiwei5ncaVs41Ip4VJQKThnQj0e3m7MBbKwn2jM8tZrJZEqi/ht7hVAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"afa0b7996ae1ae1037fb299bbfd1317fece0a9e611f720078b42beccca466ae2","last_reissued_at":"2026-05-18T02:52:33.817166Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:52:33.817166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Comment on \"Phase separation in a two-species Bose mixture\"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Fei Zhan, Ian P. 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