In this paper, we investigate the bouncing universe in a modified gravity model $f(Q,T)$. The bouncing universe theory posits that the universe goes through periodic expansions and contractions, with a “bounce” occurring at the end of each contraction that leads to a new expansion. This theory suggests that our universe didn’t emerge on its own out of nothing, but is instead the latest in a series of universes that have been expanding and contracting for eternity. It has gained renewed interest in recent years as a potential alternative to the Big Bang theory, which suggests that our universe began with a massive expansion from a singularity. According to the above explanations, first, we review of $f(Q,T)$ gravity model, then the bouncing universe scenario according to the $f(Q,T)$ gravity model in some special functions is analyzed in detail. We find that in which condition of parameters space, bouncing occurs.

在本文中，我们研究了修改后的重力模型中的弹跳宇宙$F（问,\mathrm{时间}）$。弹跳宇宙理论认为，宇宙会经历周期性的膨胀和收缩，每次收缩结束时都会发生“弹跳”，从而导致新的膨胀。这一理论表明，我们的宇宙并不是凭空出现的，而是一系列永恒膨胀和收缩的宇宙中最新的一个。近年来，它作为大爆炸理论的潜在替代方案重新引起了人们的兴趣，大爆炸理论表明我们的宇宙始于奇点的大规模膨胀。根据上面的解释，首先我们回顾一下$F（问,\mathrm{时间}）$重力模型，然后根据以下的弹跳宇宙场景$F（问,\mathrm{时间}）$对一些特殊函数中的引力模型进行了详细分析。我们发现在参数空间的什么条件下，会发生弹跳。