AMU conjecture for surface groups

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Let Σ\Sigma be a closed surface of genus at least 22, let p=2rp=2r be an even integer, and consider the quantum representation

ρp:π1(Σ)⟶∏n=1r−1PAut(Vp(Σ,n)).\rho_p:\pi_1(\Sigma)\longrightarrow \prod_{n=1}^{r-1}\mathrm{PAut}(V_p(\Sigma,n)).

Here Vp(Σ,n)V_p(\Sigma,n) is the vector space assigned by the SU(2)\mathrm{SU}(2) Witten–Reshetikhin–Turaev TQFT to Σ\Sigma equipped with a banded point colored by nn. AMU conjecture. If γ∈π1(Σ)∖{1}\gamma\in\pi_1(\Sigma)\setminus\{1\} is not a power of a simple element, then ρp(γ)\rho_p(\gamma) has infinite order for all sufficiently large pp. This conjecture predicts that quantum representations detect the non-simple nature of mapping classes represented by surface-group elements; the paper discusses its application through asymptotics of quantum representations, but the supplied text does not establish the conjecture in full.

References

Primary source

Julien Marché and Ramanujan Santharoubane, “Asymptotics of quantum representations of surface groups”, arXiv:1607.00664 (2016).

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