REVIEW 3 cited by
Gapped boundary of (4+1)d beyond-cohomology bosonic SPT phase
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Signed reviews
abstract
In this work we study gapped boundary states of $\mathbb{Z}_N$ bosonic symmetry-protected topological (SPT) phases in 4+1d, which are characterized by mixed $\mathbb{Z}_N$-gravity response, and the closely related phases protected by $C_N$ rotation symmetry. We show that if $N\notin \{2,4,8,16\}$, any symmetry-preserving boundary theory is necessarily gapless for the root SPT state. We then propose a (3+1)$d$ $\mathbb{Z}_2$ gauge theory coupled to fermionic matter as a candidate boundary theory for $N=2,4,8,16$, where the anomalous symmetry is implemented by invertible topological defects obtained from gauging (2+1)$d$ chiral topological superconductors. For the $C_N$ case, we present an explicit construction for the boundary states for $N=2,4,8,16$, and argue that the construction fails for other values of $N$.
Forward citations
Cited by 3 Pith papers
-
Bosonic SPT and invertible phases and its relation to Steenrod's problem
Bosonic beyond-cohomology SPT phases are governed by a mod-3 Steenrod-power differential, and a new 6+1-dimensional Z3×Z3 Dijkgraaf-Witten phase is nontrivial on simplicial complexes but trivial on manifolds.
-
The Classification of 3+1d Symmetry Enriched Topological Order
Finite-group-enriched 3+1d topological orders are classified by 2SVect-enriched G-crossed braided fusion 2-categories, with gauging obstructions living in SW^5(BG).
-
Fermion Families and Pontryagin Class: Topological Field Theory via Colour Symmetry Extension
From anomaly cancellation plus a stipulated minimality principle, the Standard Model is forced to N_c=N_f=3; the paper proves supporting theorems: H^d(Z_n,U(1)) cocycles split under the Z_n→Z_{n^2} extension, while A_...
Discussion (0). Continue with ORCID to comment.