Quantum cryptography allows the establishing of a highly confidential sequence of random bits between two parties who share no secret information in advance.Its security is guaranteed by the basic laws of quantum mechanics rather than mathematical difficulty.An experimental system based on a novel protocol for quantum cryptography using only two nonorthogonal photon polarization states is implemented.The photon sources are two semiconductor laser diodes operated at 680 nm,their light pulses which are heavily attenuated to far below one photon per pulse are employed to encode the key.Gated single photon detection technique is used to minimize the dark count effect of the photon multiplier tube.Key establishing rate of 40 b/s and error rate of 2.1%are obtained.Compared with other systems,our system has the simplest experimental setup.
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机译：Reports Summarize Machine Learning Study Results from Southern University of Science and Technology (SUSTech) (Experimental Quantum-enhanced Machine Learning In Spin-based Systems)
机译：Kinetics of mn-based sorbents for hot gas desulfurization: Task 2 - exploratory experimental studies. Quarterly report, march 15, 1996--June 15, 1996
