Measurement based QIP using NV- in diamond
Jason Smith
University of Oxford, United Kingdom
Abstract: Entanglement schemes such as those of Barrett & Kok and Lim & Beige show that cluster states can be generated by performing optical measurements on remote single qubits, thus overcoming the tremendous challenge of fabricating materials in which many qubits interact directly with each other in a controllable fashion. Two further advantages follow; firstly that it opens the field to materials in which only a very small fraction of the qubits are usable, and secondly that it allows each qubit to be situated in its own tailored local environment. Here we discuss two material systems - nitrogen vacancy defects in diamond, and self-assembled semiconductor quantum dots - in which published works indicate that the required optical measurements of a highly coherent spin state are eminently achievable, and assess what challenges remain to be addressed before the entanglement of remote solid state spins becomes a reality.