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There is an extremely exciting footnote/remark from Prof. Frank Wilczek during the subsequent Question and Answer (Q&A) session (starting from 01 h 03 min 42 sec) of his recently held presentation:

Time Crystals: Past, Present, and Future | Prof. Frank Wilczek (08 March 2021)

Prof. Frank Wilczek (starting from 01 h 03 min 42 sec):

Another possibility that is more novel but more speculative is that there may have been in the early universe – all kind of things might have happened in the very early universe, we just don’t know – there might have been a period where you have not smooth evolution but a very rapidly oscillating behavior taking over for a while, so a time crystal in the more usual sense where you have many oscillations. But it is also interesting to speculate that under extreme conditions of a curvature so at the center of a black hole for instance as well as in the early universe you might have new phases of space-time that are crystalline in some sense. Because you are talking about space-time it would be very unnatural to just have crystals that are not also time crystals. So I think there is a small literature but it is an interesting possibility to consider time crystallization of space-time itself and possible application areas would be black holes and the early universe.

So the question here is: Are there any recent experimental results or literature from a reputable source to back up Prof. Frank Wilczek’s novel hypothesis of time crystallization of space-time itself in the very early universe or should it be treated at this time just as an interesting but speculative footnote?

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