Observation of Four-Photon Interference with a Beam Splitter by Pulsed Parametric Down-Conversion

1999 ◽  
Vol 83 (5) ◽  
pp. 959-962 ◽  
Author(s):  
Z. Y. Ou ◽  
J.-K. Rhee ◽  
L. J. Wang
Keyword(s):  
Beam Splitter ◽  
Parametric Down Conversion ◽  
Down Conversion

scholarly journals Partial Bell-State Analysis with Parametric down Conversion in the Wigner Function Formalism

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
A. Casado ◽  
S. Guerra ◽  
J. Plácido
Keyword(s):  
Wigner Function ◽  
Beam Splitter ◽  
Bell State ◽  
Function Formalism ◽  
State Measurement ◽  
Parametric Down Conversion ◽  
Correlation Properties ◽  
Light Beams ◽  
Down Conversion ◽  
State Analysis

We apply the Wigner function formalism to partial Bell-state analysis using polarization entanglement produced in parametric down conversion. Two-photon statistics at a beam-splitter are reproduced by a wave-like description with zeropoint fluctuations of the electromagnetic field. In particular, the fermionic behaviour of two photons in the singlet state is explained from the invariance on the correlation properties of two light beams going through a balanced beam-splitter. Moreover, we show that a Bell-state measurement introduces some fundamental noise at the idle channels of the analyzers. As a consequence, the consideration of more independent sets of vacuum modes entering the crystal appears as a need for a complete Bell-state analysis.

scholarly journals Counting of Hong-Ou-Mandel Bunched Optical Photons Using a Fast Pixel Camera

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3475
Author(s):  
Andrei Nomerotski ◽  
Michael Keach ◽  
Paul Stankus ◽  
Peter Svihra ◽  
Stephen Vintskevich
Keyword(s):  
Spatial Resolution ◽  
Time Resolution ◽  
Interference Effect ◽  
Beam Splitter ◽  
Good Time ◽  
Spatial Mode ◽  
Parametric Down Conversion ◽  
Optical Photons ◽  
Down Conversion ◽  
Good Time Resolution

The uses of a silicon-pixel camera with very good time resolution (∼nanosecond) for detecting multiple, bunched optical photons is explored. We present characteristics of the camera and describe experiments proving its counting capabilities. We use a spontaneous parametric down-conversion source to generate correlated photon pairs, and exploit the Hong-Ou-Mandel (HOM) interference effect in a fiber-coupled beam splitter to bunch the pair onto the same output fiber. It is shown that the time and spatial resolution of the camera enables independent detection of two photons emerging simultaneously from a single spatial mode.

EFFICIENT POLARIZATION ENTANGLEMENT GENERATION FROM SPATIALLY CORRELATED PHOTONS

2009 ◽  
Vol 07 (04) ◽  
pp. 795-800
Author(s):  
BIN GU ◽  
CHUAN-QI LI ◽  
YU-LIN CHEN
Keyword(s):  
Degrees Of Freedom ◽  
Beam Splitter ◽  
Practical Application ◽  
Entanglement Generation ◽  
Spatially Correlated ◽  
Parametric Down Conversion ◽  
Down Conversion ◽  
Polarizing Beam Splitter

We present an efficient protocol for polarization entanglement generation from spatially correlated photons in spontaneous parametric down-conversion. Compare with the protocol proposed by Shimuzu et al. (Phys. Rev. A77 032338), only one polarizing beam splitter is used in this protocol, which makes it simpler and more convenient in a practical application. By increasing the number of the slits, we provide a way for generation of a hyperentangled state in both the spatial and polarization degrees of freedom.

Generation of Optical—Terahertz Biphotons and Detection of Their Terahertz Component under Frequency-Nondegenerate Parametric Down-Conversion

JETP Letters ◽  
2020 ◽  
Vol 112 (5) ◽  
pp. 269-273
Author(s):  
V. D. Sultanov ◽  
K. A. Kuznetsov ◽  
A. A. Leontyev ◽  
G. Kh. Kitaeva
Keyword(s):  
Parametric Down Conversion ◽  
Down Conversion
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