0703212v2

related topics
{photon, photons, single}
{wave, scattering, interference}
{light, field, probe}
{operator, operators, space}
{bell, inequality, local}
{field, particle, equation}
{energy, state, states}
{entanglement, phys, rev}

Is orbital angular momentum always conserved in spontaneous parametric down-conversion?

Sheng Feng, Chao-Hsiang Chen, Geraldo A. Barbosa, Prem Kumar

abstract: In the non-linear optical process of type-II spontaneous parametric down-conversion, we present on an experiment showing that the two-photon detection amplitude of the down-converted beams does not generally reproduce the transverse profile of the pump beam that carries non-zero orbital angular momentum. We explain this observation by that orbital angular momentum is not conserved in the type-II non-linear process due to the broken rotational symmetry of the Hamiltonian.

oai_identifier:
oai:arXiv.org:quant-ph/0703212
categories:
quant-ph
comments:
4 pages, 3 figures, submitted to Phys. Rev. Lett. Revised
doi:
10.1117/12.734118
arxiv_id:
quant-ph/0703212
created:
2007-03-22
updated:
2007-04-20

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