Researchers at Toshiba Corporation achieved a breakthrough in quantum computer architecture with the development of a double-transmon coupler. This technology enables high-speed quantum computations with strong coupling and completely turns off residual coupling, improving accuracy and processing time.
Toshiba has successfully raised the power conversion efficiency (PCE) of its transparent Cu2O solar cell to 8.4%, a world record for a reported Cu2O solar cell. The company estimates that an overall PCE of 27.4% can be achieved, notably above the 26.7% highest PCE reported for any standard silicon cell.
Toshiba has developed the world's first chip-based quantum key distribution (QKD) system, enabling mass manufacture of quantum security technology. This advancement will bring quantum cryptography to a wider range of scenarios, including IoT solutions.
Toshiba has demonstrated record distances for quantum communications using a novel 'dual band' stabilisation technique, enabling QKD over 600km. The technique sends two optical reference signals to minimise phase fluctuations on long fibres, resulting in constant optical phase stability even after propagation through hundreds of km.
The new technology minimizes hardware limitations, enabling continued increases in computing speed and scale. Toshiba expects the new scale-out approach to bring significant benefits to financial transactions and robotics industries.
The Ballistic Simulated Bifurcation Algorithm (bSB) and the Discrete Simulated Bifurcation Algorithm (dSB) can solve large-scale combinatorial optimization problems up to 20,000 times faster than current machines, achieving near-optimal solutions in record time.