Possible principles for construction of computing structures using single quantum logic elements

The possibility of local synchronization of high speed single quantum logic elements (SQUID's) in complex digital circuits is demonstrated. Self-timed devices are possible in which the operating frequency is independent of device complexity and is automatically maintained at a level determined solely by the local properties of the logic elements. For present day Nb Josephson technology this operating frequency can reach 6100 GHz, which shows the need for further intense study of development of complex circuits on the basis of such SQUID logic. The excellent combinatorial properties of the circuits presented are basically due to the use of register properties (i.e., inherent memory) of SQUID family logic block.