论文标题
评论“ Sachdev-Ye-Kitaev模型中的混沌综合过渡”
Comment on "Chaotic-Integrable Transition in the Sachdev-Ye-Kitaev Model"
论文作者
论文摘要
在Arxiv：1707.02197中，作者认为具有二次扰动的Sachdev-Ye-Kitaev模型（也称为质量成形的SYK），并声称Quantum Lyapunov指数将在低温和小四分之一的小四分之一的耦合方面消失。我们在该制度中精确地计算指数，并表明其非零。
In arXiv:1707.02197, the authors considered the Sachdev-Ye-Kitaev model with quadratic perturbation (also known as mass-deformed SYK), and claimed that the quantum Lyapunov exponent would vanish in the regime of low temperature and small quartic coupling. We calculate the exponent exactly in that regime and show that it is nonzero.
