Is the Universe Unreal as per Quantum Mechanics?

[摘要] The announcement of the 2022 Nobel Prize in Physics to A.Aspect, J. F. Clauser and A. Zeilinger, with the citation “$forexperiments with entangled photons, establishing the violationof Bell’s inequalities and pioneering quantum information sci-ence$,” has rekindled an old debate—is the universe real, oris it just our imagination? Social media is exploding withstatements like quantum mechanics (QM) has proved that the“universe is not real”, “reality is an illusion”, “it is all ourmind’s projection”, “objects exist only in our heads”, “nothingexists out there”, “conscious observer brings the worldinto existence”, and so on... Anyone who has worked on quantumsystems or has taught QM would find such statementssuperficial, misrepresenting QM and even the process of science.So, what QM advocates in connection to reality is criticallyexamined here.

[学科分类] 社会科学、人文和艺术（综合）

[关键词] Quantum mechanics;reality;wave function;spin;Stern–Gerlach experiment;Bell’s inequality.