  A scalable, high-performance quantum processor can be implemented using
near-resonant dipole-dipole interacting dopants in a solid state host. In this
scheme, the qubits are represented by ground and subradiant states of effective
dimers formed by pairs of closely spaced two-level systems, while the two-qubit
entanglement either relies on the coherent excitation exchange between the
dimers or is mediated by external laser fields.
