The concept of creating a "time bubble" where time stops or slows down radically is a popular theme in science fiction, but it remains purely speculative and has no basis in current scientific understanding.
According to our current understanding of physics, particularly in the framework of classical and quantum mechanics, there is no known mechanism or concept that would allow for the creation of a time bubble where time comes to a complete halt or slows down dramatically in a localized region. Time is intricately woven into the fabric of spacetime, and it is not a separate entity that can be manipulated or altered in such a dramatic manner.
Time dilation, as described by the theory of relativity, does allow for the slowing down or speeding up of time relative to different observers or in different gravitational fields. However, this is a subtle effect that occurs due to relative motion or differences in gravitational potential, and it does not involve stopping time entirely or creating localized bubbles.
It is worth noting that our current understanding of physics is always evolving, and there may be concepts or phenomena that we have not yet discovered or understood fully. So, while it is not currently within the realm of scientific possibility based on our current knowledge, it is always conceivable that future advancements in our understanding of the universe may reveal new insights and possibilities regarding time and its manipulation.