No, it’s not possible. No matter how many equations they write, there will be no time travel.
Why?
God is the only being that is outside the continuum of cause/effect. Humans are stuck in that continuum and have no way to get out.
Yes he is a quack. But we can affect what apparantly happened in the past in regard to wave function collapse per our choice to observe it. Our bodies are part of the natiral universe and operate in its space time, but we are hybrid creaters with a faculty for reason and moral apprehension and free will in eternity.
The past is done; we are the future of the past. The future to us hasn’t happened yet. Today is the tomorrow we worried about yeste3rday.
There already is. One can travel into the future. But there is no way to travel to the past.
Simply accelerate yourself as fast as possible towards the speed of light. The time dilation effect. Proven.