Research Team Led by the Hitachi Cambridge Laboratory Demonstrates Hybrid Circuit

London, 18 June 2019 --- Hitachi Europe Ltd., a wholly owned subsidiary of Hitachi, Ltd. (TSE: 6501, "Hitachi") today announced that researchers at the Hitachi Cambridge Laboratory ("HCL"), working in collaboration with academic partners at the University of Cambridge, University College London, and CEA-LETI ('the team'), have developed and demonstrated a hybrid electronic circuit to address a barrier to realizing a practical large-scale quantum computer known as the “I/O problem.”(1) Inspired by dynamic random-access memory (DRAM) architecture, the hybrid electronic circuit combines conventional and quantum devices on a chip using complementary metal-oxide semiconductor (CMOS) technology, to deliver input and output signals to quantum processors while keeping the number of connections manageable, and thereby reduce the complexity of quantum computing architecture. This innovation represents another milestone in current worldwide efforts for the realization of a practical large-scale fault-tolerant quantum computer.