> You don't get your PhD in US/Canadian/European universities without publications

Publications are not a universal Ph.D. requirement at US universities.

Usually the main Ph.D. requirements are: course of study, qualifying process (e.g. exams and/or dissertation proposal/approval), written dissertation, oral defense, and possible residency (i.e. tuition) and teaching requirements.

MIT doesn't mandate publications: https://oge.mit.edu/gpp/degrees/doctoral/

Neither does Stanford: https://gap.stanford.edu/handbooks/gap-handbook/chapter-4/su...

Neither does Yale: http://catalog.yale.edu/gsas/policies-regulations/#degreereq...