Quantum voting protocol without quantum memory

Most of the quantum voting protocols are impractical due to currently limited storage capabilities. In this article, based on interference principle light, we proposed a new protocol without memory. our protocol, ballot is sequence non-orthogonal coherent states, information encoded by implying different phase shifts and vote counting carried out performing USD measurement states. Particularly, design states eliminates need for storage. Our satisfies general security requirements can resist various attacks. addition, be implemented only linear optics thus experimentally achieved with current technology.