Depending of the questions and the intricacy of the reply, probably.
What are they?
First: my (very over-simplified and probably incorrect) understanding:
Vacuum is not empty; there is energy present. That energy represents an infinite number of possible wavelengths. Virtual particle pairs (matter and anti-matter counterparts) constantly emerge -- for nearly infinitesimal times -- and disappear as a result of that energy.
'Casimir Gaps', constructed of extremely parallel conductive plates placed very close together, demonstrate this by creating a region between the plates where certain wavelengths are 'forbidden'. Since there are fewer particle-antiparticle virtual pairs between the plates than outside them, there is a small pressure which pushes the plates together.
Second: questions
The vacuum energy is always present; but apparently not always equal -- the region between the plates is 'impoverished', as one example. Is there a way to enrich a region of space with additional energy?
Certain wavelengths of virtual energy are excluded from between Casimir plates -- what is the energy distribution / spectrum of those wavelengths? Is this just a black-body spectrum?
Third: conjecture
If it is possible to enrich the vacuum energy (by, for example, creating a very strong magnetic field), while simultaneously restricting the wavelengths to very short values, then a drive is possible. Create a region (which is in a strong magnetic field) which is very likely to manifest (restricted to very short wavelengths) B mesons, where the matter and anti-matter particles are different and have different decay paths. The magnetic field imparts (and picks up) a small momentum on each particle in a pair & their decay products. The pairs tend to be aligned because of the magnetic field, and the differential in imparted momentum is your driving force.
It would seem stronger magnets would provide more noticeable results.
At best, this would provide an extremely tiny but non-zero force. Like I said -- it is a bit kooky.
