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by shakna 2225 days ago
Officially? No.

> Anything that relies on something other than TeX or (PDF)LaTeX will fail. At this time arXiv does not support processing with: XeTeX and its variants including LuaTeX, LyX, or PDFTeX. [0]

However, you'll frequently see papers with:

> Comments: PDF file generated using XeLaTeX/XeTeX.

Such as [1], where the author would prefer submitting a PDF-only than jump through the hoops to make it work under standard LaTeX.

[0] https://arxiv.org/help/faq/mistakes

[1] https://arxiv.org/abs/1410.4830