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Japan's NTT, the fourth largest telecommunications company in the world, recently announced the formation of a cooperative organization of Japanese firms designed to promote Japan's technical position in quantum technologies and to help Japan complete globally with US and Chinese rivals in both quantum computing and quantum communications. The inaugural meeting of the group, held in late May 2021, was attended by 11 Japanese companies, including leading IT suppliers Fujitsu, Hitachi, NEC, and Toshiba as well as industrial partners including Toyota Motor, Mitsubishi Chemical, and the Mizuho Financial Group. More than 50 companies are ultimately expected to join the group.

Researchers at the US-based Lawrence Berkeley National Lab (LBNL) recently reported a new approach to error mitigation in a quantum computer (QC) that targets error-producing noise, a ubiquitous problem that can severely limit the performance and utility of existing and near-future quantum computers. The method developed at LBNL consists of taking an initial noisy target circuit and constructing an analogous estimation circuit that is configured specifically for accurate noise characterization. The information gathered from running the estimation circuit is then applied to correct the noise in the original target circuit.