Abstract
With a view toward a fracton theory in condensed matter, we introduce a higher-moment polynomial degree-p global symmetry, acting on complex scalar/vector/tensor fields (e.g., ordinary or vector global symmetry for p$=0$ and p$=1$ respectively). We relate this higher-moment global symmetry of $n$-dimensional space, to a lower degree (either ordinary or higher-moment, e.g., degree-(p-$\ell$)) subdimensional or subsystem global symmetry on layers of $(n-\ell)$-submanifolds. These submanifolds are algebraic affine varieties (i.e., solutions of polynomials). The structure of layers of submanifolds as subvarieties can be studied via mathematical tools of embedding, foliation, and algebraic geometry. We also generalize Noether's theorem for this higher-moment polynomial global symmetry. We can promote the higher-moment global symmetry to a local symmetry, and derive a new family of higher-rank-m symmetric tensor gauge theory by gauging, with m = p$+1$. By further gauging a discrete $\mathbb{Z}_2^C$ charge conjugation (particle-hole) symmetry, we derive a new general class of rank-m tensor non-abelian gauge field theory (the gauge structure is non-commutative thus non-abelian but not an ordinary group): a hybrid class of (symmetric or non-symmetric) higher-rank-m tensor gauge theory and anti-symmetric tensor topological field theory, generalizing [arXiv:1909.13879], interplaying between gapless and gapped sectors.
Highlights
Fracton orders [1,2] are the new kinds of orders in manybody quantum matter systems
Fracton orders are defined physically by exhibiting some of the following properties:1 (1) For gapped fractons, their ground state degeneracy (GSD) is similar to topological order [5] with GSD depending on the topology of base space or spatial manifolds
(3) Fracton orders are associated with the long-range entangled phases of quantum matter, obtainable by dynamically gauging the subsystem global symmetries or subdimensional global symmetries of the full quantum systems [9,10,11]
Summary
Fracton orders [1,2] are the new kinds of orders in manybody quantum matter systems. Fracton orders are defined physically by exhibiting some of (if not all of) the following properties:. To help the readers understanding the non-Abelian gauge structure [ZC2 (U(1)x(n) )] in Eq (1.1), here we show the noncommutative symmetry operations between the U(1)x(n) vector global symmetry transformation (Fig. 1) and the ZC2 charge conjugation (particle-hole) symmetry transformation on a complex bosonic scalar field (x) ∈ C in cartoon figures; see Fig. 2. (1) Higher-moment global symmetry for a complex scalar charge field ∈ C: A general polynomial degree-( m − 1). In Eq (1.5) are constants independent of spacetime coordinates When we gauge such a higher-moment polynomial degree-( m − 1) global symmetry, we will introduce a rank-m compact symmetric tensor gauge field Ai1,...,i m.
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