According to our current understanding of physics, reversing the arrow of time is not possible. The arrow of time is a concept that describes the asymmetry of physical processes, where events tend to unfold in a particular direction—commonly referred to as "forward" in time. This direction is characterized by increasing entropy or disorder in the universe.
To reverse the arrow of time, one would need to reverse the increase in entropy, which would require an immense amount of energy. However, there are fundamental physical principles, such as the second law of thermodynamics, that indicate that entropy always tends to increase or stay the same in isolated systems.
Furthermore, the idea of reversing time raises many theoretical and conceptual challenges that are not currently understood or supported by our scientific knowledge. While time reversal is sometimes explored in thought experiments and within the context of certain mathematical models, it does not have a practical or feasible application in reality.
In summary, the energy required to reverse the arrow of time is currently beyond our technological capabilities and goes against our current understanding of the fundamental laws of physics.