  We study the back-reaction of a quantum scalar field on anti-de Sitter (AdS)
space-time. The renormalized expectation value of the stress-energy tensor
operator for a massless, conformally-coupled quantum scalar field on global AdS
space-time in four space-time dimensions acts as a source term on the
right-hand-side of the Einstein equations for the quantum-corrected metric. We
solve the quantum-corrected Einstein equations numerically and find deviations
from pure AdS which increase as the temperature of the quantum scalar field
state increases. We interpret these quantum-corrected metrics as
asymptotically-AdS solitons, and study the mass of these solitons as a function
of the temperature of the quantum scalar field.
