Superconducting Quantum Bits (Qubits)

Quantum Information Disappears at the Atomic Scale, Brookhaven and Princeton U Scientists Look to Find Sources of Loss

Engineers and materials scientists studying superconducting quantum information bits (qubits)—a leading quantum computing material platform based on the frictionless flow of paired electrons—have collected clues hinting at the microscopic sources of qubit information loss. This loss is one of the major obstacles in realizing quantum computers capable of stringing together millions of qubits to run demanding computations. Such large-scale, fault-tolerant systems could simulate complicated molecules for drug development, accelerate the discovery of new materials for clean energy, and perform other tasks that would be impossible or take an impractical amount of time (millions of years) for today’s most powerful supercomputers.

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“Hold Sway Over 100 [Qubits] or More”

Recent quantum computing developments have revealed possibilities of stable quantum environments that are ‘reasonable’ in resource requirements. The tool of “sampling complexity” plays into the power of a small quantum computer versus a classical computer. Sampling complexity, the tool, “…involves a mathematical tool—a standard measure of computational difficulty known as sampling complexity—that gauges how easy or hard it is for an ordinary computer to simulate the outcome of a quantum experiment.”

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