How to translate "黑科技" into English？ As titled, how to translate "黑科技" in to english?

Is there any translation better than "fictional technology"?
"Black Technology"

It is a role of Japanese light novels Full Metal Panic! .


  黑科技（Black Technology）——是指倾听者所拥有，但是非人类自力研发；凌驾于人类现有的科技之上的知识。


Black Technology is obtained from the Whispered who is another role of Full Metal Panic! . It is so knowledgeable that it overtops the existing technology of human being.

Nowadays, "黑科技" is often used to describe the companies which have unbelievable technology, such as Sony.