"theoretically feasible" is correct and usable in written English.
You can use it to indicate that something is theoretically possible, even if it is not actually possible or probable in practice. For example, "A machine that could perform mathematical calculations without any human input would be theoretically feasible, but probably impossible to create with current technology".
This is theoretically feasible.
As of the end of August, about 78 percent of the stadium was complete, according to FIFA, making the target date at least theoretically feasible.
In a completely closed tradition it is theoretically feasible to reconstruct the archetype with such certainty that only a single form of the text without variants remains to be examined.
Even though this method is theoretically feasible, it is not commercially implemented.
Therefore, it would be theoretically feasible to engineer metabolic processes quantitatively by mining enzymatic kinetic database.
The synthetic pathway found in P. novae-zelandiae means that betalain production by fungal fermentation is theoretically feasible.
This encouraging result shows that magnetic resonance contrast directly based on the neuronal currents present in the cortex is theoretically a feasible imaging technique.
Dynamic propagation and storing-retrieving of a weak infrared (IR -light pulse IR -lightled semiconductor double-quantum-dot (SDQD) structure are studied theoretically with feasible pulseeters.
Theoretically, the feasible problem (1) can be regarded as the following minimum problem approximately widehat{mathbf{x}}=underset{mathbf{x}}{argmin}left{left|right|left|mathbf{F}mathbf{x}right|-mathbf{b}left|right|_2^2+{mathbb{I}}_{mathrm{S}}left(mathbf{x}right)right}.
Complex interventions in obese pregnant women should be theoretically based, feasible and shown to demonstrate anticipated behavioural change prior to inception of large randomised controlled trials (RCTs).
This study theoretically investigated a feasible modal phase-matching second-harmonic generation (SHG) in chalcogenide photonic crystal fiber.
