Comparative Test of Two Methods of Quantum Efficiency Absolute Measurement Based on Squeezed Vacuum Direct Detection
I. N. Agafonov, M. V. Chekhova, T. Sh. Iskhakov, A. N. Penin, G. O. Rytikov, O. A. Shumilkina
备注：
13 pages, 6 figures, Proceedings of the "V workshop ad memoriam of Carlo Novero Advances in Foundations of Quantum Mechanics and Quantum Information with atoms and photons" will be published in International Journal of Quantum Information
We realize and test in experiment a method recently proposed for measuring absolute quantum efficiency of analog photodetectors. Similarly to the traditional (Klyshko) method of absolute calibration, the new one is based on the direct detection of two-mode squeezed vacuum at the output of a traveling wave OPA. However, in the new method one measures the difference-photocurrent variance rather than the correlation function of photocurrents (number of coincidences), which makes the technique applicable for high-gain OPA. In this work we test the new method versus the traditional one for the case of photon-counting detectors where both techniques are valid.
A comparative study of protocols for secure quantum communication under noisy environment: single-qubit-based protocols versus entangled-state-based protocols
Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency
Leibniz Universität Hannover（汉诺威莱布尼茨大学）；Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut)（引力物理学马克斯·普朗克研究所（阿尔伯特·爱因斯坦研究所））；Universität Hamburg（汉堡大学）；Institut für Laserphysik（激光物理研究所）；Zentrum für Optische Quantentechnologien（光学量子技术中心）
Mechanisms and Opportunities for Tunable High-Purity Single Photon Emitters: A Review of Hybrid Perovskites and Prospects for Bright Squeezed Vacuum
Glasgow College, University of Electronic Science and Technology of China（电子科技大学格拉斯哥学院）；Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China（电子科技大学基础与前沿科学研究院）
