  This volume contains a selection of papers presented at the 9th in a series
of international conferences on Quantum Simulation and Quantum Walks (QSQW).
During this event, we worked on the development of theories based upon quantum
walks and quantum simulation models, in order to solve interrelated problems
concerning the simulation of standard quantum field theory, quantum gravity and
cosmological models, dissipative quantum computing, searching on complex
quantum networks, and the topological classification of multi-particle quantum
walks.
