I don't have access to the paper, just the abstract. But the force reported is equivalent to a 3 mg grain of sand; .01% of what the Chinese experiment reported. That is a huge difference indicating some issues. This test also needs further validation. For instance, it was not conducted in a vacuum, meaning air was present (including moisture) that could have been affected by the microwave radiation emitted in the enclosure (ionic air flow). The abstract states the Null test also gave a positive result although designed to give a negative, which needs more explanation- what was tested, what not? This means what they thought was causing the effect isn't.
In short, the paper says they need to do further more careful testing to even validate the initial results reported, not that they say the drive really works.
I'm all for checking out all ideas, even if they seem crazy, but I am very skeptical of this. I recall FTL particle detection that was retracted after follow-up testing revealed a flaw in the setup.
And the reported source of quantum virtual particles is non-physical math model being paraded as actual reality instead of as math. How is energy created out of nothing and converted to mass which then vanishes instantly- by being converted to energy but is not easily detectable after 100 years of theory work? I think you should be able to power your house with quantum foam.
Alcubierre is the basis of FSD in Elite.
Just my opinion though I am punching above my weight. Your mileage may vary.