The idea that aliens might be using black holes as quantum computers is speculative and not supported by any direct evidence.
However, some physicists have proposed that a highly advanced civilization could use the properties of black holes to perform computational tasks beyond the capabilities of traditional computers.
The concept of "black hole complementarity" suggests that an observer outside a black hole and an observer inside a black hole would have different but complementary views of the same physical system. Some physicists have suggested that a civilization could use a network of black holes to perform quantum computation, taking advantage of the unique properties of black holes.
However, this is a highly speculative idea that is not currently supported by any direct observations or evidence. While the idea of using black holes as quantum computers is intriguing, it is still theoretical speculation rather than a confirmed scientific result.
