The Rise of Dark Energy
  While dark energy has dominated cosmic dynamics only since $z\approx0.7$, its
energy density was still $\gtrsim5\%$ of the total out to $z\approx2.5$. We
calculate model independent constraints on its fraction from future galaxy
surveys, finding that the rise of dark energy could be detected at $3\sigma$
nearly out to $z\approx2.5$.
