Investors in quantum computing stocks are having another great week, with shares in the major publicly traded firms up by double digits over the last 24 hours in most cases. Here’s a snapshot of their single-day growth as of the closing bell on Thursday: • Rigetti Computing (Nasdaq: RGTI): Up 18.25% • D-Wave Quantum Inc (NYSE: QBTS): Up 13.97% • IONQ Inc (NYSE: IONQ): Up 10.32% • Quantum Computing Inc (Nasdaq: QUBT): 5;32%

All four companies were also up in premarket trading on Friday as of this writing.

Why are quantum computing stocks rising this week?

The rally is apparently being led in part by Berkeley, California-based Rigetti, which announced a major purchase order on Tuesday for two of its 9-qubit Novera quantum computing systems, which are used in research and developme

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