Journal
OPTICA
Volume 2, Issue 6, Pages 523-529Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.2.000523
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Funding
- European Commission (EC) [PIOF-GA-2012- 329851, 600645 EU-FP7-ICT]
- European Research Council (ERC) [227844]
- FWF [SFB F40, W1210-2]
- Generalitat de Catalunya (CIRIT Project) [2014 SGR 966]
- MINECO [FIS2013-40627-P, JCI 2012-14155]
- Austrian Science Fund (FWF) [W1210] Funding Source: Austrian Science Fund (FWF)
- European Research Council (ERC) [227844] Funding Source: European Research Council (ERC)
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Integrated optics allows for the generation and control of increasingly complex photonic states on chip-based architectures. Here, we implement two entangled qutrits-a nine-dimensional quantum system-and demonstrate an exceptionally high degree of experimental control. The approach, which is conceptually different to common bulk optical implementations, is heavily based on methods of integrated in-fiber and on-chip technologies and further motivated by methods commonly used in today's telecommunications industry. The system is composed of an in-fiber source creating entangled qutrit states of any amplitude and phase, and an on-chip integrated general Multiport enabling the realization of any desired local unitary transformation within the two qutrit nine-dimensional Hilbert space. The complete design is readily extendible toward higher dimensions with moderate increase in complexity. Ultimately, our scheme allows for complete on-chip integration. We demonstrate the flexibility and generality of our system by realizing a complete characterization of the two-qutrit space of higher-order Einstein-Podolsky-Rosen correlations. (C) 2015 Optical Society of America
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