Exploring topological entanglement through Dehn surgery

Abstract

We compute the $\text{PSL}(2,\mathbb{C})$ Chern-Simons partition function of a closed 3-manifold obtained from Dehn fillings of the link complement $\mathbf S^3\backslash {\mathcal{L}}$, where $\mathcal{L}=\mathcal{K}# H$ is the connected sum of the knot $\mathcal {K}$ with the Hopf link $H$. Motivated by our earlier work on topological entanglement and the reduced density matrix $σ$ for such link complements, we wanted to determine a choice of Dehn filling so that the trace of the matrix $σ$ becomes equal to the $\text{PSL}(2,\mathbb{C})$ partition function of the closed 3-manifold. We use the SnapPy program and numerical techniques to show this equivalence up to the leading order. We have given explicit results for all hyperbolic knots $\mathcal{K}$ up to six crossings.

Figures (5)

• Figure 1: Figure-eight knot ($4_1$ knot)
• Figure 2: $4_1 \# \text{Hopf link}$
• Figure 3: The three-twist knot ($5_2$ knot).
• Figure 4: Six crossing knots
• Figure 5: Ideal Tetrahedron