Cluster state generation using solid-state single-photon sources

Micro-fabricated lens in diamond

Setup for optical detection

Mounted nitrogen-vacancy in diamond sample

Measurement-based one-way quantum computing introduced a new paradigm for quantum information processing whereby the unitary evolution required in the traditional circuit model is replaced by projective measurements on a highly entangled cluster. Cluster states are not only a universal resource for quantum computing but have also led to the development of schemes that tolerate significant photon loss- and error-rates.

We are using nitrogen-vacancy (NV) centers in diamond as solid-state single-photon sources for the efficient generation of entangled strings of photons. We aim to realize scalable optical measurement-based quantum computing by having emitted a string of single photons that are entangled as a cluster state. For enhancing the collection efficiency of the emitted single photons we are designing and building integrated cavities that open up also possibilities for more complex networks.

 

Background:

Deterministic generation of a cluster state of entangled photons
I. Schwartz, D. Cogan, E.R. Schmidgall, Y. Don, L. Gantz, O. Kenneth, N.H. Lindner, D. Gershoni
Science 354, 6311 (2016).

Proposal for Pulsed On-Demand Sources of Photonic Cluster State Strings
N.H. Lindner, T. Rudolph
Physical Review Letters 103, 113602 (2009).