According to our current understanding of physics, reversing entropy to travel back in time is not possible. Entropy is a measure of the disorder or randomness in a system, and the arrow of time, as defined by the second law of thermodynamics, states that the entropy of an isolated system tends to increase over time.
Time travel to the past is a concept that has been explored in science fiction, but it remains purely speculative at present. While there are various theories and ideas about time travel, such as wormholes, black holes, or cosmic strings, they all involve complex and hypothetical mechanisms that are far beyond our current technological capabilities.
Furthermore, even if we were to discover a way to manipulate entropy or create a mechanism for time travel, it would likely involve significant energy requirements and potential paradoxes. The notion of traveling back in time raises numerous philosophical and scientific questions, such as the grandfather paradox (where a person travels back in time and prevents their own existence), which challenge the logical consistency of such scenarios.
It's important to note that scientific understanding and theories evolve over time, so our current limitations and knowledge may change in the future. However, as of now, the concept of reversing entropy to achieve time travel remains purely speculative and outside the realm of known physics.