Wormholes have long been a topic of scientific fascination, offering the potential for traversing vast distances of space-time in an instant. However, traditional wormhole models have relied on exotic matter with negative energy densities to stabilize and maintain their structure. This abstract presents a novel concept of a self-supporting wormhole, which eliminates the need for such exotic matter and explores the feasibility of its existence within the framework of current theoretical physics.

We consider the quantum fields in the background of a space-time obtained by certain Z_2 quotient of the BTZ black hole. We analyse the back reaction of the matter field on the space-time geometry up to first order in metric perturbation. The expectation value of the stress-energy tensor can be computed exactly by considering its pull-back onto the covering space. Upon a suitable choice of the boundary condition on the quantum field around a non-contractible cycle of the quotient manifold it is possible to obtain the average energy on a null geodesic to be negative there by resulting a traversable wormhole.