Figure 1
From: Role of flow of information in the speedup of quantum evolution

The implementation of the model. A single-end PC waveguide, whose end lies at x = 0, is coupled to a two-level atom (qubit) at x = x0.
From: Role of flow of information in the speedup of quantum evolution

The implementation of the model. A single-end PC waveguide, whose end lies at x = 0, is coupled to a two-level atom (qubit) at x = x0.