Towards quantum integrated optics

Warit Asavanant, Akira Furusawa

Many of the proof-of-principle experiments in quantum optics have been carried out using table-top free-space optics. While they provide good testbeds for optical quantum optics experiments, to build actual devices and quantum computers, we have to move to the integrated optics where reproducibility and stability are more reliable. In this chapter, we review the developments of the integrated optics for optical quantum computer with the main focus on their applications in continuous-variable optical quantum computation.

Claire F. Gmachl

Ian S. Osborne

Quantum Optics The ability to pattern optical circuits on-chip, along with coupling in single and entangled photon sources, provides the basis for an integrated quantum optics platform. Wang et al. demonstrate how they can expand on that platform to fabricate very large quantum optical circuitry. They integrated more than 550 quantum optical components and 16 photon sources on a state-of-the-art single silicon chip, enabling universal generation, control, and analysis of multidimensional entanglement. The results illustrate the power of an integrated quantum optics approach for developing quantum technologies. Science , this issue p. [285][1] [1]: /lookup/doi/10.1126/science.aar7053

Pascal A. Baldi, Marc de Micheli, J.-S. Tanzilli +1 more

We present the use of quasi-phase matching technique and integrated optical technology on lithium niobate for quantum optical information. Based on recent achievements, we will discuss the large potential of nonlinear integrated quantum optics. The use of integrated optical technology and quasi-phase matching technique, extensively developped in our laboratory on lithium niobate, is very attractive for quatum optics as it allows the integration of various elements such as correlated pair sources, electrically controllable beam splitters, phase modulators, and wavelength selectors, on a single wafer, eventually eliminating the need for bulk optical interconnections. Such integrated optical components should permit the realization of compact, performant, elements for various quantum optical experiments.

Krishna Thyagarajan