How does real gdp affect the domestic currency? When the domestic real gdp per capita increases then it has a negative effect on domestic currency (depreciation)? Why?

Source: The real exchange rate of euro and Greek economic growth, Gregory T. Papanikos, The Journal of Economic AsymmetriesVolume 12, Issue 2, November 2015, Pages 100-109.
file:///C:/Users/ACER/Downloads/1__Papper_exchange%20rate-gdp%20growth%20(15).pdf

The real exchange rate of euro and Greek economic growth
Gregory T. Papanikos - So i got the information from this source