Quantum circuits are supposed to gain power as they grow longer, but noise changes the picture. A new study finds that earlier steps in these circuits gradually lose their impact, with only the final layers really mattering. As a result, deep quantum circuits behave more like shallow ones. This limits what current quantum computers can realistically achieve.Quantum circuits are supposed to gain power as they grow longer, but noise changes the picture. A new study finds that earlier steps in these circuits gradually lose their impact, with only the final layers really mattering. As a result, deep quantum circuits behave more like shallow ones. This limits what current quantum computers can realistically achieve. Top Technology News — ScienceDailyRead More