Quantum entanglement and the two-photon Stokes parameters

A formalism for two-photon Stokes parameters is introduced to describe the polarization entanglement of photon pairs. This leads to the definition of a degree of two-photon polarization, which describes the extent to which the two photons act as a pair and not as two independent photons. This pair-w...

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Bibliographic Details
Published in:Optics communications 2002-01, Vol.201 (1-3), p.93-98
Main Authors: Abouraddy, Ayman F., Sergienko, Alexander V., Saleh, Bahaa E.A., Teich, Malvin C.
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Foundations, theory of measurement, miscellaneous theories (including aharonov-bohm effect, bell inequalities, berry's phase)
Fundamental areas of phenomenology (including applications)
Nonclassical field states
squeezed, antibunched and sub-poissonian states
operational definitions of the phase of the field
phase measurements
Optics
Physics
Quantum information
Quantum mechanics
Quantum optics
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Description
Summary:A formalism for two-photon Stokes parameters is introduced to describe the polarization entanglement of photon pairs. This leads to the definition of a degree of two-photon polarization, which describes the extent to which the two photons act as a pair and not as two independent photons. This pair-wise polarization is complementary to the degree of polarization of the individual photons. The approach provided here has a number of advantages over the density matrix formalism: it allows the one- and two-photon features of the state to be separated and offers a visualization of the mixedness of the state of polarization.
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(01)01645-5