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Measurement-induced decoherence and information in double-slit interference Public Deposited

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  • The double slit experiment provides a classic example of both interference and the effect of observation in quantum physics. When particles are sent individually through a pair of slits, a wave-like interference pattern develops, but no such interference is found when one observes which “path” the particles take. We present a model of interference, dephasing, and measurement-induced decoherence in a one-dimensional version of the double-slit experiment. Using this model, we demonstrate how the loss of interference in the system is correlated with the information gain by the measuring apparatus/observer. In doing so, we give a modern account of measurement in this paradigmatic example of quantum physics that is accessible to students taking quantum mechanics at the graduate or senior undergraduate levels.
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  • Kincaid, J., McLelland, K., & Zwolak, M. (2016). Measurement-induced decoherence and information in double-slit interference. American Journal of Physics, 84(7), 522-530. doi:10.1119/1.4943585
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  • 84
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  • 7
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2016-08-05T20:34:55Z (GMT) No. of bitstreams: 2 krauserp996005846.zip: 915202 bytes, checksum: dbd20a1015d7cc2afc83f0bbfe4e1f53 (MD5) KincaidMeasurementInducedDecoherence .pdf: 1073111 bytes, checksum: 21eab252b79a6cd27c2820b8ac061406 (MD5)
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