Bell's measure in classical optical coherence

    Authors

    K. H. Kagalwala; G. Di Giuseppe; A. F. Abouraddy;B. E. A. Saleh

    Comments

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    Abbreviated Journal Title

    Nat. Photonics

    Keywords

    ENTANGLEMENT; INTERFERENCE; INEQUALITIES; POLARIZATION; SYSTEMS; STATES; Optics; Physics, Applied

    Abstract

    The statistical description of optical fields in classical coherence theory is the foundation for many applications in metrology, microscopy, lithography and astronomy. Partial coherence is commonly attributed to underlying fluctuations originating at the source or arising upon passage through a random medium. A less acknowledged source of uncertainty (partial coherence) stems from the act of ignoring a degree of freedom of a beam when observing another degree of freedom coupled to (or classically entangled with) it. We demonstrate here that Bell's measure, which is commonly used in tests of quantum non-locality, may be used as a quantitative tool in classical optical coherence to delineate native incoherence associated with statistical fluctuations from correlation- (or, entanglement-) based incoherence. Our results demonstrate the applicability of the concepts recently developed in quantum information science to classical optical coherence theory and optical signal processing.

    Journal Title

    Nature Photonics

    Volume

    7

    Issue/Number

    1

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    72

    Last Page

    78

    WOS Identifier

    WOS:000312835200017

    ISSN

    1749-4885

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