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The feasibility of satellite-to-ground quantum communication is demonstrated by using a microsatellite in low-Earth orbit. The quantum states are discriminated by a ground receiver with four photon-counters with a quantum bit error rate below 5%.
The efficiency and indistinguishability of single-photon emission by a quantum dot optically coupled to a microcavity and to a waveguide are theoretically investigated. Owing to unavoidable phonon sideband, they can never reach 100% simultaneously.
More than 500 near-infrared laser photons are scattered by a single electron into a single X-ray photon. This is the first experimental evidence of high-order multiphoton Thomson scattering and validates the decades-old theoretical predictions.
An evanescent single-molecule biosensor that operates at the fundamental precision limit, allowing a four-order-of-magnitude reduction in optical intensity while maintaining state-of-the-art sensitivity, is demonstrated.
Methyl ammonium lead triiodide perovskite wafers for application in direct conversion X-ray detectors are fabricated by a room-temperature sintering process. A conversion efficiency of 2,527 mC Gyaircm–2 under 70 kVp X-ray exposure is obtained.
A large-scale, low-loss and phase-stable programmable nanophotonic processor is fabricated to explore quantum transport phenomena. The signature of environment-assisted quantum transport in discrete-time systems is observed for the first time.
Exploitation of the valley electronic structure of transition metal dichalcogenides with exciton–polaritons is an elusive challenge. Now, valley-polarized exciton–polaritons in monolayers of MoS2 have been demonstrated.
An optical method for the temporal and spatial reconstruction of the electric field of few-cycle pulses is developed. The method is based on two attosecond technologies: extreme-ultraviolet interferometry and a directional electric field detector.
Ultrafast electron microscopy with an order-of-magnitude enhancement in the typical temporal resolution is demonstrated, permitting the imaging of ultrafast electron dynamics that last a few tens of femtoseconds.
A nanofibre optic force transducer with 0.2 pN sensitivity is demonstrated. The set-up is used to monitor bacterial motion, observe heart cell beating and detect infrasound power in solution.
The amplitude of a Schrödinger's cat (SC) state — superposed coherent state — is increased using a homodyne measurement. A pair of negative SC states with amplitude of 1.15 is probabilistically converted to a single positive SC state with amplitude of 1.85.