Gravitational imaging Gravitational Imaging  So as we know from the famous theory and equations of Einstein is it possible to track the individual gravitational pull?
 A: It is an interesting link you provide, but it has nothing to do with General Relativity and the stress energy tensor except in a general way, that all gravitational interactions could be modeled with the mathematics of general relativity. For the device one just needs newtonian gravitation, as this map:


Earth's gravity measured by NASA GRACE mission, showing deviations from the theoretical gravity of an idealized smooth Earth, the so-called earth ellipsoid. Red shows the areas where gravity is stronger than the smooth, standard value, and blue reveals areas where gravity is weaker

In the link you gave, similar measurements to much greater accuracy are claimed, the accuracy due to the quantum effects of atomic nature, (not quantum gravitational):

Neil Stansfield, of the Defence Science and Technology Laboratory, said the new quantum gravity detector works by using lasers to freeze atoms in position and then measuring how the tiny particles are affected by the gravitational pull of nearby objects.
By studying how the particles are influenced by the mass of nearby objects, scientists can then draw a 3D map highlighting how density changes nearby.

This is similar to the gravitational map of the earth shown above, but hopefully extremely more accurate.
A: @anna v has answered the question, but some history can be added.
"Modern gravity exploration began during the first third of the twentieth century and continues to this day as a small but important element in current exploration programs ... The first geophysical oil and gas discovery,
the Nash dome in coastal Texas, was the result of a torsion balance survey (LaFehr, 1980). A historical outline of the early development of the gravity method of exploration, from pendulums to torsion balances to gravimeters, is given by Eckhardt (1940)."
The gravitational torsion balance was invented by Eötvös, starting about 1885, and has been improved many times.
