Wavelength-multiplexed quantum networks with ultrafast frequency combs
By J. Roslund, R. M. de Araújo, Shifeng Jiang, Claude Fabre, Nicolas Treps. Nature Photonics, 2013
461 citations recorded by the source corpus.
Highly entangled quantum networks (cluster states) lie at the heart of recent approaches to quantum computing1,2. Yet the current approach for constructing optical quantum networks does so one node at a time3,4,5, which lacks scalability. Here, we demonstrate the single-step fabrication of a multimode quantum resource from the parametric downconversion of femtosecond-frequency combs. Ultrafast pulse shaping6 is employed to characterize the comb's spectral entanglement7,8. Each of the 511 possible bipartitions among ten spectral regions is shown to be entangled; furthermore, an eigenmode decomposition reveals that eight independent quantum channels9 (qumodes) are subsumed within the comb. This multicolour entanglement imports the classical concept of wavelength-division multiplexing to the quantum domain by playing upon frequency entanglement to enhance the capacity of quantum-information processing. The quantum frequency comb is easily addressable, robust with respect to decoherence and scalable, which renders it a unique tool for quantum information. Single-step fabrication of a multimode quantum resource from the parametric downconversion of femtosecond frequency combs is demonstrated. Each of the 511 possible bipartitions among ten spectral regions is shown to be entangled. Furthermore, an eigenmode decomposition reveals that eight independent quantum channels (qumodes) are subsumed within the comb.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/a1c25db94bc3445c31e91f63229480eebcb7dab6
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Photonic quantum information processing: A concise review (2019, background): “The most commonly used mode pairs are orthogonal polarizations or non-overlapping propagation paths, but recently, other degrees of freedom such as transverse spatial, 15–17 frequency mode, 18–21 temporal bin-, 22–25 and temporal mode-23,26–29 encoding are attracting attention.”