A hands-on tour of four different quantum computers showcased at NVIDIA GTC, each using a different type of qubit: neutral cesium atoms (Inflection), trapped ions (Quantinuum), photons (Sci Quantum), and superconducting engineered circuits (Rigetti). The piece explains how each design works at a beginner level, covering cooling requirements, laser control, gate operations, and signal amplification. It also highlights IQM's cloud interface that lets regular users rent time on quantum computers with 16 to 54 qubits.
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