Three-party quantum secret sharing of secure direct communication based on x-type entangled states

Based on x-type entangled states and the two-step protocol [Deng F G, Long G L and Liu X S 2003 Phys. Rev. A 68 042317], a quantum secret sharing protocol of secure direct communication based on x-type entangled states ｜X00〉3214 is proposed. Using some interesting entanglement properties of this state, the agent entirety can directly obtain the secret message from the message sender only if they collaborate together. The security of the scheme is also discussed.     

BM6201FS在无叶风扇控制系统中的应用设计

针对当前无叶风扇控制器存在成本高、稳定性差等问题,设计了一种低成本高稳定性的无叶风扇控制器;以 R5F104A单片机为控制核心,无位置传感器的三相无刷直流电机为控制对象,采用高耐压快速大功率MOS集成电路BM6201FS为电机功率驱动电路,降低无叶风扇电路系统成本,采用反电动势过零点检测法确定电机转子的位置信息,软件补偿硬件滤波电路产生的电机换相相移,提高控制器的可靠性;实验结果表明控制器工作稳定可靠,性价比高。     

Three-party quantum secret sharing of secure direct communication based on χ-type entangled states

Based on χ-type entangled states and the two-step protocol [Deng F G,Long G L and Liu X S 2003 Phys.Rev.A 68 042317],a quantum secret sharing protocol of secure direct communication based on χ-type entangled states |χ00 3214 is proposed.Using some interesting entanglement properties of this state,the agent entirety can directly obtain the secret message from the message sender only if they collaborate together.The security of the scheme is also discussed.