A long-standing challenge in quantum physics may finally have a practical solution. Researchers in Japan have developed a new way to identify complex quantum states in a single step, potentially removing one of the biggest bottlenecks in building real-world quantum technologies.
The advance centers on a specific type of entanglement known as a W state. Unlike other well-known quantum states, W states are more resilient. Even if one particle is lost, the remaining particles can stay entangled. This makes them especially attractive for quantum communication systems, where losses are unavoidable.
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