PIRSA:15040063

Video URL

https://pirsa.org/15040063

Signals, Noise and Decoherence

Weinstein, S. (2015). Signals, Noise and Decoherence. Perimeter Institute for Theoretical Physics. https://pirsa.org/15040063

Weinstein, Steve. Signals, Noise and Decoherence. Perimeter Institute for Theoretical Physics, Apr. 28, 2015, https://pirsa.org/15040063 

          @misc{ scivideos_PIRSA:15040063,
            doi = {10.48660/15040063},
            url = {https://pirsa.org/15040063},
            author = {Weinstein, Steve},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Signals, Noise and Decoherence},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2015},
            month = {apr},
            note = {PIRSA:15040063 see, \url{https://scivideos.org/pirsa/15040063}}
          }

Steve Weinstein University of Waterloo

Talk numberPIRSA:15040063
DOI10.48660/15040063
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

 It is well known - to those who know it - that noise and randomness can enhance signal resolution. I'll present an easy-to-follow example from digital audio that illustrates the way in which adding noise ("dither") prior to measurement enhances the accuracy with which we are able to distinguish the features of the sound or image. I will then explore the way in which the environmental interactions prior to measurement ordinarily characterized as environment-induced decoherence may play a similar role.  The paradoxical conclusion is that the quasiclassical behavior associated with such systems may be a more accurate representation of the quantum world than what we think of as fully "quantum" behavior, which may in turn be artifactual, the result of errors similar to those introduced by the discretization (also known as "quantization") of data in digital audio and imaging.