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      "text": "One former employee and quantum computing expert after another ridiculed or mocked IonQ’s notion of photonic interconnects, indicating that IonQ hasn’t even proven that the concept works in principle much less via an engineering solution – a “choke point” and “weak link.”",
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      "text": "The question is, how do I connect qubits in module A to qubits in module B? Because you have to do it with as high fidelity or else your module to module connection is your choke point. That’s the weak link. So, that is the major challenge that I see with the IonQ approach [...] But how do you connect modules together so that you have an extensible or scalable quantum system. They have talked publicly about some ideas to do that [...] But the fidelities with which they can do that today, at least what I’ve seen in the public domain, have not been that high.” - Leading quantum computing scientist and longtime friend of both co-founders",
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      "text": "The approach IonQ does is they want to build multiple individual smaller traps and then connect them by fiber optics. They haven’t shown in principle that it works and that now it’s an engineering problem. The second problem is just adding more ions or qubits is not the hardest part. You also have to make them work properly. Usually, the more large the systems are, the harder it gets to control it. That’s one of the biggest obstacles that we have in quantum computation. Adding more qubits is not the hardest part. The hardest part is really making them behave in a quantum way and that they keep all of their properties as we try to scale up and going to bigger and bigger systems [...] Their roadmap is with these multiple traps to interconnect them. I personally am not super-convinced about that approach. I think that’s their biggest drawback.”- IBM quantum computing researcher with expertise in ion-traps",
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      "text": "This whole story where they’re going to photonically interconnect chambers to grow the device, I have real problems with. Think about I need to get to 1000 qubits. So, I’m going to interconnect what? Fifty or 100 of these 40-qubit chambers? And what’s going to happen to errors, and what’s going to happen to connectivity? I just don’t think it’s a good solution. Their ability to scale, I just don’t believe. - Former executive",
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      "text": "\"This whole story where they’re going to photonically interconnect chambers to grow the device, I have real problems with. Think about I need to get to 1000 qubits. So, I’m going to interconnect what? Fifty or 100 of these 40-qubit chambers? And what’s going to happen to errors, and what’s going to happen to connectivity? I just don’t think it’s a good solution. Their ability to scale, I just don’t believe.\" — Former executive; \"The question is, how do I connect qubits in module A to qubits in module B? Because you have to do it with as high fidelity or else your module to module connection is your choke point. That’s the weak link. So, that is the major challenge that I see with the IonQ approach [...] But how do you connect modules together so that you have an extensible or scalable quantum system. They have talked publicly about some ideas to do that [...] But the fidelities with which they can do that today, at least what I’ve seen in the public domain, have not been that high.\" — Leading quantum computing scientist and longtime friend of both co-founders; \"The approach IonQ does is they want to build multiple individual smaller traps and then connect them by fiber optics. They haven’t shown in principle that it works and that now it’s an engineering problem. The second problem is just adding more ions or qubits is not the hardest part. The hardest part is really making them behave in a quantum way and that they keep all of their properties as we try to scale up and going to bigger and bigger systems [...] Their roadmap is with these multiple traps to interconnect them. I personally am not super-convinced about that approach. I think that’s their biggest drawback.\" — IBM quantum computing researcher with expertise in ion-traps",
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      "text": "Source: Scorpion Capital consultation calls with experts",
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