Developing continuous-time quantum computing

Continuous-time quantum computing is a unified view of quantum computation using continuous-time quantum walks, adiabatic quantum computing, and quantum annealing. A range of special purpose quantum simulators also fit into this model. It uses a register of qudits (qubits as special case) to which Hamiltonian time evolution is applied.
The Hamiltonian can be varied continuously in time, and the register can also be coupled to an engineered bath environment, providing controllable open quantum system effects in addition to unitary time evolution. Continuous-time quantum computing is complementary to the circuit model, and it provides a computational model for quantum computing in which techniques can be adopted across what were previously seen as separate approaches. In particular, it suggests that hardware platforms suitable for one should be suitable for all, thus providing a focus for hardware design and development of continuous-time quantum computers, alongside digital quantum computers.