Exceptional properties such as long coherence times, fault tolerant fidelities, fast and high fidelity state read-out, together with CMOS integration capabilities set spin-qubits amongst the top players in the race towards the quantum computer.

The causality condition states that the outcome of a present experiment should not depend on any future experiment and it is an important assumption in standard quantum theory.

We will examine generic tripartite systems in which two probe objects interact via an experimentally inaccessible mediator.

In this talk, I will explore both the theoretical and experimental opportunities that mechanical resonators provide for engineering one-way (nonreciprocal) and topological states.