Admissibility and Weyl-orbit conjecture for soliton contents

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Let B=Br1,l1⊗⋯⊗BrL,lLB=B^{r_1,l_1}\otimes\cdots\otimes B^{r_L,l_L} be a tensor product of crystals of type AnA_n, and let m=(mj(a))m=(m^{(a)}_j) be a soliton content. Define

P(m)={p∈B∣p is evolvable, Ej(a)(p)=∑k≥1min⁡(j,k)mk(a)},P(m)=\{p\in B\mid p\text{ is evolvable},\ E^{(a)}_j(p)=\sum_{k\geq1}\min(j,k)m^{(a)}_k\},

let pj(a)p^{(a)}_j be the corresponding vacancy numbers, let H={(a,j)∣1≤a≤n, j∈Z≥1, mj(a)>0}H=\{(a,j)\mid1\leq a\leq n,\ j\in\mathbb Z_{\geq1},\ m^{(a)}_j>0\}, and let λ(m)=∑a=1np∞(a)Λa\lambda(m)=\sum_{a=1}^n p^{(a)}_\infty\Lambda_a. Admissibility and Weyl-orbit conjecture. One has

P(m)≠∅if and only ifpj(a)≥0for all (a,j)∈H,P(m)\neq\emptyset\quad\text{if and only if}\quad p^{(a)}_j\geq0\quad\text{for all }(a,j)\in H,

and

{wt⁡p∣p∈P(m)}=Wλ(m),\{\operatorname{wt}p\mid p\in P(m)\}=W\lambda(m),

where WW is the Weyl group of AnA_n. This predicts both the vacancy-number criterion for nonemptiness and the exact Weyl-group orbit of the weights of the corresponding states. The supplied text gives no resolution status.

References

Primary source

Atsuo Kuniba and Akira Takenouchi, “Periodic cellular automata and Bethe ansatz”, arXiv:math-ph/0511013 (2006).

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