  The quantum field theoretic description of general relativity is a modern
approach to gravity where gravitational force is carried by spin-2 gravitons.
In the classical limit of this theory, general relativity as described by the
Einstein field equations is obtained. This limit, where classical general
relativity is derived from quantum field theory is the topic of this thesis.
  The Schwarzschild-Tangherlini metric, which describes the gravitational field
of an inertial point particle in arbitrary space-time dimensions, $D$, is
analyzed. The metric is related to the three-point vertex function of a massive
scalar interacting with a graviton to all orders in $G_N$, and the one-loop
contribution to this amplitude is computed from which the $G_N^2$ contribution
to the metric is derived.
  To understand the gauge-dependence of the metric, covariant gauge is used
which introduces the parameter, $\xi$, and the gauge-fixing function
$G_\sigma$. In the classical limit, the gauge-fixing function turns out to be
the coordinate condition, $G_\sigma=0$. As gauge-fixing function a novel family
of gauges, which depends on an arbitrary parameter $\alpha$ and includes both
harmonic and de Donder gauge, is used.
  Feynman rules for the graviton field are derived and important results are
the graviton propagator in covariant gauge and a general formula for the
n-graviton vertex in terms of the Einstein tensor. The Feynman rules are used
both in deriving the Schwarzschild-Tangherlini metric from amplitudes and in
the computation of the one-loop correction to the metric.
  The one-loop correction to the metric is independent of the covariant gauge
parameter, $\xi$, and satisfies the gauge condition $G_\sigma=0$ where
$G_\sigma$ is the family of gauges depending on $\alpha$. In space-time $D=5$ a
logarithm appears in position space and this phenomena is analyzed in terms of
redundant gauge freedom.
