Multi-parameter Entanglement in Quantum Interferometry

Details Multi-parameter Entanglement in Quantum Interferometry Multi-parameter Entanglement in Quantum Interferometry

2001-11-04

arxiv.org/abs/quant-ph/0111024v2

Physics

Quantum Physics

submitted to Physical Review A

Scientific paper

The role of multi-parameter entanglement in quantum interference from collinear type-II spontaneous parametric down-conversion is explored using a variety of aperture shapes and sizes, in regimes of both ultrafast and continuous-wave pumping. We have developed and experimentally verified a theory of down-conversion which considers a quantum state that can be concurrently entangled in frequency, wavevector, and polarization. In particular, we demonstrate deviations from the familiar triangular interference dip, such as asymmetry and peaking. These findings improve our capacity to control the quantum state produced by spontaneous parametric down-conversion, and should prove useful to those pursuing the many proposed applications of down-converted light.

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