Currently, according to our understanding of physics, time travel, especially to the past, remains speculative and has not been achieved. However, I can provide you with an overview of the current scientific understanding and some of the challenges associated with time travel.
Time Travel Possibility: Theoretical physics allows for the possibility of time travel, but it relies on hypothetical concepts and advanced theories. For example, certain solutions of Einstein's field equations in general relativity, such as wormholes and closed timelike curves (CTCs), have been proposed as potential pathways for time travel. However, whether these structures exist in reality and can be utilized for time travel is still a topic of ongoing research and debate.
Time Travel and Dreaming: Dreaming, as experienced during sleep, does not provide a means for physical time travel. Dreams are subjective experiences that occur within our minds and do not involve actual physical movement through time. While dreams can sometimes create a sense of time distortion or vivid experiences, they are not considered a method for traversing time in the physical sense.
Scientific Investigation: If someone believes in the existence of time travel and wishes to explore it scientifically, they can contribute to the ongoing scientific discourse on the topic. Scientists continue to explore theories, conduct experiments, and investigate the feasibility of various time travel concepts. However, proving the existence of time travel or developing a practical method would require overcoming significant challenges, such as the need for exotic matter with negative energy densities or the resolution of various paradoxes associated with time travel, such as the grandfather paradox.
In summary, while time travel is a fascinating topic in theoretical physics, its realization currently remains speculative. Dreaming, as experienced during sleep, does not provide a means for physical time travel. However, those interested in the subject can contribute to the scientific understanding by exploring theoretical frameworks, conducting research, and engaging in discussions with experts in the field.