The physics of 2 ≠ 1 + 1

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dc.contributor.authorShih, Yanhua
dc.date.accessioned2025-08-28T16:10:32Z
dc.date.issued2007-06-01
dc.description.abstractOne 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.
dc.description.urihttps://link.springer.com/article/10.1007/s11467-007-0020-9
dc.format.extent44 pages
dc.genrejournal articles
dc.genrepreprints
dc.identifierdoi:10.13016/m2tn5h-ubfz
dc.identifier.citationShih, Yanhua. “The Physics of 2 ≠ 1 + 1.” Frontiers of Physics in China 2, no. 2 (2007): 125–52. https://doi.org/10.1007/s11467-007-0020-9.
dc.identifier.urihttps://doi.org/10.1007/s11467-007-0020-9
dc.identifier.urihttp://hdl.handle.net/11603/39993
dc.language.isoen
dc.publisherSpringer Nature
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.subjectQuantum Measurement and Metrology
dc.subject03.65.Ta
dc.subject03.65.Ud
dc.subjectQuantum Physics
dc.subject03.65.-w
dc.subjectquantum imaging
dc.subjecttwo-photon superposition
dc.subjectquantum entanglement
dc.subject42.50.Xa
dc.subjectQuantum Optics
dc.subjectQuantum Chemistry
dc.subjectQuantum Theory
dc.subjectQuantum Correlation and Entanglement
dc.titleThe physics of 2 ≠ 1 + 1
dc.typeText

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