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OSERC Seminars

Quantum state reconstruction with unknown detectors

Brian Smith 教授,牛津大学
Mon, 2014-06-30 10:00 - 11:00
物理楼616报告厅

Improved measurement techniques are central to technological development and foundational scientific exploration. Quantum physics relies upon detectors sensitive to non-classical features of quantum systems, enabling precise tests of physical laws and quantum-enhanced technologies such as precision measurement and secure communications. Accurate detector response calibration for quantum-scale inputs is key to future research and development in these cognate areas. To address this requirement quantum detector tomography (QDT) has been recently introduced. However, the QDT approach becomes increasingly challenging as the complexity of the detector response and input space grows. Here we present the first experimental implementation of a versatile alternative characterization technique to address many-outcome quantum detectors, characterizing a balanced homodyne detector. To demonstrate the applicability of this approach the calibrated detector is subsequently used to estimate non-classical photon number states.

邀请人:金贤敏 x.jin1@physics.ox.ac.uk
                       联系人:朱豪媛 hyzhu@sjtu.edu.cn