The phrase "a fundamental gap between" is correct and usable in written English.
It can be used to describe a significant difference or disparity between two or more entities, concepts, or situations.
Example: "There is a fundamental gap between the expectations of the management and the actual performance of the employees."
Alternatives: "a significant divide between" or "a crucial disparity between".
Lippmann identified a fundamental gap between what we naturally expect from democracy and what we know to be true about people.
Furthermore, there is a fundamental gap between the requirements on software specified by systems engineers and the implementation of these requirements by software engineers.
Now, even if we manage to rein in health costs, we'll still have a long-run deficit problem — a fundamental gap between the government's spending and the amount it collects in taxes.
In a recent study with two other co-authors‡, Mr Mehra, one of the economists who started it all, argues that the equity premium is so high because there is a fundamental gap between the investment goals of young and middle-aged workers.
Cell identity, the size and boundaries of tissues, and the behaviors exhibited by those cells shape the developing embryo; however, there is a fundamental gap between understanding the molecular pathways that control processes within single cells and understanding how cells work together to assemble multicellular structures.
There is a fundamental gap between the power and the people.
The remarks suggest that a fundamental gap exists between the two sides over austerity measures — and, with a major payment to the International Monetary Fund looming, make default and a Greek exit from the Eurozone seem more likely than they were even a few weeks ago.
The U.S. reversal on Kyoto, which was signed by the Clinton administration but never ratified by the Senate, also reflects a fundamental gap in values between European and American governments on everything from a social safety net for the poor to state intervention in the economy.
There was a "fundamental gap in the gathering and sharing of information between stakeholders", with council witnesses complaining that there was a "long history of Ofsted ignoring our concerns" following complaints.
There is a fundamental gap in understanding the degree to which a mechanical mismatch between hernia repair materials and host tissue contributes to failure at this interface.
