The physics of 2≠1+1 |
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Authors: | Yanhua Shih |
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Institution: | (1) Department of Physics, University of Maryland, Baltimore County, Baltimore, MD 21250, USA |
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Abstract: | One of the most surprising consequences of quantum mechanics is the entanglement of two or more distant particles. In an entangled
EPR two-particle system, the value of the momentum (position) for neither single subsystem is determined. However, if one
of the subsystems is measured to have a certain momentum (position), the other subsystem is determined to have a unique corresponding
value, despite the distance between them. This peculiar behavior of an entangled quantum system has surprisingly been observed
experimentally in two-photon temporal and spatial correlation measurements, such as “ghost” interference and “ghost” imaging.
This article addresses the fundamental concerns behind these experimental observations and to explore the nonclassical nature
of two-photon superposition by emphasizing the physics of 2 ≠ 1 + 1.
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Keywords: | quantum entanglement two-photon superposition quantum imaging |
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