| Autor: |
Bruns, Alexander, Hsu, Chia-Yu, Stryzhenko, Sergiy, Giese, Enno, Yatsenko, Leonid P., Yu, Ite A., Halfmann, Thomas, Peters, Thorsten |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Quantum Sci. Technol. 8 (2023) 015002 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/2058-9565/ac985c |
| Popis: |
Nonclassical photon sources of high brightness are key components of quantum communication technologies. We here demonstrate the generation of narrowband, nonclassical photon pairs by employing spontaneous four-wave mixing in an optically-dense ensemble of cold atoms within a hollow-core fiber. The brightness of our source approaches the limit of achievable generated spectral brightness at which successive photon pairs start to overlap in time. For a generated spectral brightness per pump power of up to $2\times 10^{9} \ \textrm{pairs/(s MHz mW)}$ we observe nonclassical correlations at pump powers below $100 \textrm{nW}$ and a narrow bandwidth of $2\pi\times 6.5 \ \textrm{MHz}$. In this regime we demonstrate that our source can be used as a heralded single-photon source. By further increasing the brightness we enter the regime where successive photon pairs start to overlap in time and the cross-correlation approaches a limit corresponding to thermal statistics. Our approach of combining the advantages of atomic ensembles and waveguide environments is an important step towards photonic quantum networks of ensemble based elements. |
| Databáze: |
arXiv |
| Externí odkaz: |
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