Generation of spectrally factorable photon pairs via multi-order
quasi-phase-matched spontaneous parametric downconversion
- URL: http://arxiv.org/abs/2111.10981v1
- Date: Mon, 22 Nov 2021 04:17:24 GMT
- Title: Generation of spectrally factorable photon pairs via multi-order
quasi-phase-matched spontaneous parametric downconversion
- Authors: Fumihiro Kaneda, Jo Oikawa, Masahiro Yabuno, Fumihiro China, Shigehito
Miki, Hirotaka Terai, Yasuyoshi Mitsumori, and Keiichi Edamatsu
- Abstract summary: We experimentally demonstrate a technique to produce spectrally factorable photon pairs utilizing multi-order quasi-phase-matching conditions.
We show that telecom-band photon pairs produced by our custom-poled crystal are highly factorable with > 95% single-photon purity.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: For advanced quantum information technology, sources of photon pairs in
quantum mechanically factorable states are of great importance for realizing
high-fidelity photon-photon quantum gate operations. Here we experimentally
demonstrate a technique to produce spectrally factorable photon pairs utilizing
multi-order quasi-phase-matching (QPM) conditions in spontaneous parametric
downconversion (SPDC). In our scheme, a spatial nonlinearity profile of a
nonlinear optical crystal is shaped with current standard poling techniques,
and the associated phase-matching function can be approximated to a Gaussian
form. By the measurement of a phase-matching function and the second-order
autocorrelation function, we demonstrate that telecom-band photon pairs
produced by our custom-poled crystal are highly factorable with > 95%
single-photon purity.
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