Barbosa Geraldo A, Corndorf Eric, Kumar Prem, Yuen Horace P
Center for Photonic Communication and Computing, Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, USA.
Phys Rev Lett. 2003 Jun 6;90(22):227901. doi: 10.1103/PhysRevLett.90.227901. Epub 2003 Jun 2.
We demonstrate theoretically and experimentally that secure communication using intermediate-energy (mesoscopic) coherent states is possible. Our scheme is different from previous quantum cryptographic schemes in that a short secret key is explicitly used and in which quantum noise hides both the bit and the key. This encryption scheme allows optical amplification. New avenues are open to secure communications at high speeds in fiber-optic or free-space channels.
我们通过理论和实验证明，使用中能（介观）相干态进行安全通信是可行的。我们的方案与以往的量子密码方案不同，它明确使用了一个短密钥，并且量子噪声掩盖了比特和密钥。这种加密方案允许光放大。新的途径为在光纤或自由空间信道中进行高速安全通信开辟了道路。
