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Abstract
We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: strong correlation and independence of the quantum walkers, between and within the planes of the cross. Violations of a classically defined inequality, for photons injected in the same plane and in orthogonal planes, reveal nonclassical behavior in a nonplanar structure.
Original language | English |
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Article number | 143604 |
Number of pages | 5 |
Journal | Physical Review Letters |
Volume | 112 |
Issue number | 143604 |
DOIs | |
Publication status | Published - 10 Apr 2014 |
Structured keywords
- QETLabs
Keywords
- Photons
- quantum walks
- waveguides
- photonics
- Quantum optics
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