This workshop on the “Complex Quantum Systems: a quantum computing perspective” is to be held at Cumberland Lodge, 26th – 29th July 2021. Its aim is to bring together both experimentalists and theorists from across the UK and Europe working on realising, simulating and modelling complex quantum systems across atomic, molecular and condensed matter physics. The major focus will be on new mathematical and computational methods, the discussion of novel experimental result and the challenges of modelling them, and an over-arching theme of exploring how quantum computation can accelerate scientific computing in these domains.