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Scientists have created an error-free quantum bit, or qubit, from a single pulse of light, raising hopes for a light-based room-temperature quantum computer in the future. While bits in classical computers store information as either 1 or 0, qubits in quantum computers can encode information as a superposition of 1 and 0, meaning one qubit can adopt both states simultaneously.  When quantum computers have millions of qubits in the future, they will process calculations in a fraction of the time that today's most powerful supercomputers can. But the most powerful quantum computers so far have only been built with roughly 1,000 qubits.  Most qubits are made from a superconducting metal, but these need to be cooled to near absolute zero to achieve stability for the laws of quantum mechanics to dominate. Qubits are also highly prone to failure, and if a qubit fails during a computation, the data it stores is lost, and a calculation is delayed. One way to solve this probl...

Electric vehicle (EV) range anxiety could soon be a thing of the past thanks to a breakthrough in battery technology, which could give EVs a range of more than 620 miles (1,000 kilometers). Today's EVs have a maximum range of 300 miles (480 km) on average . Even the longest-range electric car, the Lucid Air , runs out of charge after about 500 miles (800 km). But in a new study, researchers used tiny silicon particles and a gel-based electrolyte to tap into the high- charge capacity of silicon anodes in lithium-ion batteries. The scientists published their findings on Jan. 17 in the journal Advanced Science . Charging works inversely, with positive lithium ions returning to the anode and electrons flowing back across a circuit to the terminal as it gains a positive charge. When no more ions can flow to the node — now technically a cathode — the battery is considered fully charged. Silicon has been widely explored as a candidate for the anode in lithium-ion batteries ...