Measurement without “measurement”: Experimental violation of Complementarity and its aftermath

          @misc{ pirsa_PIRSA:05110024,
            doi = {10.48660/05110024},
            url = {https://pirsa.org/05110024},
            author = {Afshar, Shahriar},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Measurement without “measurement”: Experimental violation of Complementarity and its aftermath},
            publisher = {Perimeter Institute},
            year = {2005},
            month = {nov},
            note = {PIRSA:05110024 see, \url{https://pirsa.org}}
          }
          

Abstract

Bohr’s Principle of Complementarity of wave and particle aspects of quantum systems has been a cornerstone of quantum mechanics since its inception. Einstein, Schrödinger and deBroglie vehemently disagreed with Bohr for decades, but were unable to point out the error in Bohr’s arguments. I will report three recent experiments in which Complementarity fails, and argue that the results call for an upgrade of the Quantum Measurement theory. Finally, I will introduce the novel concept of Contextual Null Measurement (CNM) and discuss some of its surprising applications. Web-page: users.rowan.edu/~afshar/ Preprint (published in Proc. SPIE 5866, 229-244, 2005): http://www.irims.org/quant-ph/030503/