Abstract
Quantum Photonics Optical circuits based on the fabrication of waveguides in silica have the proven capacity to transport single photons from one part of an optical chip to another. Quantum-enhanced sensing and communication applications will require the single photons and the generated quantum states of several interacting single photons to be transported between separate chips. However, the delicate nature of the quantum states has made such interconnectivity difficult to achieve. Using grating couplers on each chip and connecting them with a single-mode fiber, Wang et al. demonstrate the ability to generate an entangled state on one chip and transfer it to another. Such a coupling and transfer of quantum states will be crucial for developing advanced quantum-based technologies. Optica 3 , 407 (2016).
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