English

Colored HOMFLY-PT polynomials of quasi-alternating $3$-braid knots

High Energy Physics - Theory 2022-05-03 v3 Mathematical Physics math.MP

Abstract

Obtaining a closed-form expression for the colored HOMFLY-PT polynomials of knots from 33-strand braids carrying arbitrary SU(N)SU(N) representation is a challenging problem. In this paper, we confine our interest to twisted generalized hybrid weaving knots which we denote hereafter by Q^3(m1,m2,n,)\hat{Q}_3(m_1,-m_2,n,\ell). This family of knots not only generalizes the well-known class of weaving knots but also contains an infinite family of quasi-alternating knots. Interestingly, we obtain a closed-form expression for the HOMFLY-PT polynomial of Q^3(m1,m2,n,)\hat{Q}_3(m_1,-m_2,n,\ell) using a modified version of the Reshitikhin-Turaev method. In addition, we compute the exact coefficients of the Jones polynomials and the Alexander polynomials of quasi-alternating knots Q^3(1,1,n,±1)\hat{Q}_3(1,-1,n,\pm 1). For these homologically-thin knots, such coefficients are known to be the ranks of their Khovanov and link Floer homologies, respectively. We also show that the asymptotic behaviour of the coefficients of the Alexander polynomial is trapezoidal. On the other hand, we compute the [r][r]-colored HOMFLY-PT polynomials of quasi alternating knots for small values of rr. Remarkably, the study of the determinants of certain twisted weaving knots leads to establish a connection with enumerative geometry related to mthm^{th} Lucas numbers, denoted hereafter as Lm,2nL_{m,2n}. At the end, we verify that the reformulated invariants satisfy Ooguri-Vafa conjecture and we express certain BPS integers in terms of hyper-geometric functions 2F1[a,b,c;z]{}_2 {\bf F}_1\left[a,b, c;z\right].

Keywords

Cite

@article{arxiv.2202.09169,
  title  = {Colored HOMFLY-PT polynomials of quasi-alternating $3$-braid knots},
  author = {Nafaa Chbili and Vivek Kumar Singh},
  journal= {arXiv preprint arXiv:2202.09169},
  year   = {2022}
}

Comments

39 pages, version appearing in Nuclear Physics B