Step transmission quantum safety direct communication method

• Main Authors: FUGUO DENG, GUILU LONG
• Format: Patent
• Language: Chinese; English
• Published: 28.04.2004
• Edition: 7
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; JAMMING OF COMMUNICATION; SECRET COMMUNICATION; TRANSMISSION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

This invention discloses a method for direct quantum communication transmission in steps safely utilizing the coherence and non-locality of tangling particles to load the effective information onto the quantum state directly in terms of a coding way agreed on by send/receive parties to transmit the effective information on the quantum channel in steps. Transmission in steps means that at least a set information of tangling particles in a same quantum state is divided into two related particle sequences, the two sides transmit one particle sequence first then the send party codes its own particle sequence and sends it to the receiver to be read out by a joint measurement device. 本发明公开了一种分步传输的量子安全直接通信方法，该方法利用纠缠粒子的相干性和非局域性，用按接发双方约定的编码方式把有效信息(特别是机密信息)直接加载到量子态上，用分步传输的方法在量子信道上传输有效信息；分步传输是指把至少一组处于同一量子态的纠缠粒子组成的信息分成至少两个相关的粒子序列，通信双方先传输一个粒子序列，在检查并确保已经安全传输后，再由发送方对己方的粒子序列编码，并把它们送达接收方，用联合测量装置读出信息。它提供了一种安全地直接传输有效信息的通信方法，并具有高编码容量的优点。