Toshiba Corporation (Toshiba) has confirmed a breakthrough technology that promises to advance progress toward the development of higher-performance quantum computers through an investigation of a potential major advance in quantum computing. Experiments conducted by a joint research group from Toshiba and RIKEN, one of Japan’s largest comprehensive research institutions, have successfully realized a Double-Transmon Coupler, a solution for superconducting quantum computers initially proposed by Toshiba. The researchers achieved a world-class fidelity of 99.90% for a two-qubit gate, which is at the heart of quantum computation. Fidelity is a standard performance indicator for quantum gates, quantifying how close an operation is to the ideal in a range from 0% to 100%, with higher percentages indicating greater accuracy in the quantum gate's operation.

In a long anticipated trial, Quantinuum ("Quantinuum", Head Office: Broomfield, Colorado, U.S.A., CEO: Rajeeb Hazra), together with Mitsui & Co., Ltd. ("Mitsui", Head Office: Tokyo, President and CEO: Kenichi Hori) and NEC ("NEC", Head Office: Tokyo, President and CEO: Takayuki Morita) today announced the successful delivery of quantum tokens across a 10km fibre-optic network in Japan. This is the first time such a delivery has been accomplished.

In organic molecules an exciton is a particle bound pair of an electron (negative charge) and its hole (positive charge). They are held together by Coulombic attraction and can move within molecular assemblies. Singlet fission (SF) is a process where an exciton is amplified, and two triplet excitons are generated from a singlet exciton. This is caused by the absorption of a single particle of light, or photon, in molecules called chromophores (molecules that absorb specific wavelengths of light). Controlling the molecular orientation and arrangement of chromophores is crucial for achieving high SF efficiency in materials with strong potential for optical device applications.

NEC Corporation has received an order for a next-generation supercomputer system from Japan’s National Institutes for Quantum Science and Technology (QST), under the National Research and Development Agency, and the National Institute for Fusion Science (NIFS), part of the National Institutes of Natural Sciences under the Inter-University Research Institute Corporation. The new supercomputer system is scheduled to be operational from July 2025.

QunaSys, a global leader in quantum software development, announced today the launch of QURI SDK, an innovative research and development platform designed for the fault-tolerant quantum computing (FTQC) era. As quantum technology advances, there is an increasing interest in researching FTQC algorithms. However, substantial technical demands have created considerable obstacles to accessing this technology. QURI SDK aims to overcome these challenges and promote the practical use of FTQC by providing a comprehensive research platform that integrates the latest architectural and algorithmic advancements.

The National Institute of Information and Communications Technology (NICT, President: TOKUDA Hideyuki, Ph.D.), NTT Corporation (NTT, President: Mr. SHIMADA Akira), Tohoku University (President: Dr. TOMINAGA Teiji) and the Tokai National Higher Education and Research System Nagoya University (President: Dr. SUGIYAMA Naoshi) succeeded in developing a new type of superconducting flux qubit that operates in zero magnetic field.

Scientists from Osaka Metropolitan University and the University of Tokyo have successfully used light to visualize tiny magnetic regions, known as magnetic domains, in a specialized quantum material. Moreover, they successfully manipulated these regions by the application of an electric field. Their findings offer new insights into the complex behavior of magnetic materials at the quantum level, paving the way for future technological advances.

TOPPAN Digital Inc. , a TOPPAN Group company and wholly owned subsidiary of TOPPAN Holdings Inc. , the National Institute of Information and Communications Technology (NICT), and ISARA Corporation (ISARA) have developed SecureBridge, a smart card system capable of supporting both currently used public-key cryptography and post-quantum cryptography (PQC) that is secure against attacks from quantum computers.

Researchers from Tohoku University and the Massachusetts Institute of Technology (MIT) have unveiled a new AI tool for high-quality optical spectra with the same accuracy as quantum simulations, but working a million times faster, potentially accelerating the development of photovoltaic and quantum materials.

In a new paper published in Physical Review Research, Tohoku University's Dr. Le Bin Ho explores the effectiveness of the squeezing technique in enhancing the precision of measurements in quantum systems with multiple factors. The analysis provides theoretical and numerical insights, aiding in the identification of mechanisms for achieving maximum precision in these intricate measurements.