  We illustrate the application of Quantum Computing techniques to the
investigation of the thermodynamical properties of a simple system, made up of
three quantum spins with frustrated pair interactions and affected by a hard
sign problem when treated within classical computational schemes. We show how
quantum algorithms completely solve the problem, and discuss how this can apply
to more complex systems of physical interest, with emphasis on the possible
systematics and on their control.

High Energy Physics - Lattice;Statistical Mechanics;Quantum Physics