What is the fine-grained topic of the following text: Lieven Vandersypen, an associate professor at Delft University and quantum computing researcher, told the IEEE Spectrum that he is surprised that investors have put money into the company and that D-Wave “hasn’t published any major advances or breakthroughs in the scientific literature.” He adds that the company has very little detail to support their claims, something that a peer-reviewed article would have. Only return the topic.
Lieven Vandersypen's criticism of D-Wave's lack of significant scientific publications and unsupported claims about quantum computing advancements.