Quantum portals for time travel are based on the idea that principles of quantum mechanics, such as superposition and entanglement, could be utilized to create portals that allow people to travel between different time periods. These portals would theoretically enable journeys to the past or future, exploring events or solving problems that are currently impossible. Although this concept is purely speculative and scientifically unfounded, it is popular in the science fiction genre and creates intriguing narrative possibilities.