Inequivalence between the Euclidean and Lorentzian versions of the type IIB matrix model from Lefschetz thimble calculations

Chien-Yu Chou, Jun Nishimura, Ashutosh Tripathi

The type IIB matrix model is conjectured to describe superstring theory nonperturbatively in terms of ten $N\times N$ bosonic traceless Hermitian matrices $A_{\hat{I}}¼$ ($μ=0, \ldots ,…