تقرير
Improved heralded single-photon source with a photon-number-resolving superconducting nanowire detector
| العنوان: | Improved heralded single-photon source with a photon-number-resolving superconducting nanowire detector |
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| المؤلفون: | Davis, Samantha I., Mueller, Andrew, Valivarthi, Raju, Lauk, Nikolai, Narvaez, Lautaro, Korzh, Boris, Beyer, Andrew D., Colangelo, Marco, Berggren, Karl K., Shaw, Matthew D., Sinclair, Neil, Spiropulu, Maria |
| المصدر: | Physical Review Applied 18.6 (2022): 064007 |
| سنة النشر: | 2021 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Physics - Optics |
| الوصف: | Deterministic generation of single photons is essential for many quantum information technologies. A bulk optical nonlinearity emitting a photon pair, where the measurement of one of the photons heralds the presence of the other, is commonly used with the caveat that the single-photon emission rate is constrained due to a trade-off between multiphoton events and pair emission rate. Using an efficient and low noise photon-number-resolving superconducting nanowire detector we herald, in real time, a single photon at telecommunication wavelength. We perform a second-order photon correlation $g^{2}(0)$ measurement of the signal mode conditioned on the measured photon number of the idler mode for various pump powers and demonstrate an improvement of a heralded single-photon source. We develop an analytical model using a phase-space formalism that encompasses all multiphoton effects and relevant imperfections, such as loss and multiple Schmidt modes. We perform a maximum-likelihood fit to test the agreement of the model to the data and extract the best-fit mean photon number $\mu$ of the pair source for each pump power. A maximum reduction of $0.118 \pm 0.012$ in the photon $g^{2}(0)$ correlation function at $\mu = 0.327 \pm 0.007$ is obtained, indicating a strong suppression of multiphoton emissions. For a fixed $g^{2}(0) = 7e-3$, we increase the single pair generation probability by 25%. Our experiment, built using fiber-coupled and off-the-shelf components, delineates a path to engineering ideal sources of single photons. Comment: Model and analysis integrated into main text. Corrected equations. 17 pages, 11 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.18.064007 |
| URL الوصول: | http://arxiv.org/abs/2112.11430 |
| رقم الأكسشن: | edsarx.2112.11430 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevApplied.18.064007 |
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