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Strongly correlated photons generated by coupling a three- or four-level system to a waveguide
- Source :
- Phys. Rev. A 85, 043832 (2012)
- Publication Year :
- 2012
-
Abstract
- We study the generation of strongly correlated photons by coupling an atom to photonic quantum fields in a one-dimensional waveguide. Specifically, we consider a three-level or four-level system for the atom. Photon-photon bound states emerge as a manifestation of the strong photon-photon correlation mediated by the atom. Effective repulsive or attractive interaction between photons can be produced, causing either suppressed multiphoton transmission (photon blockade) or enhanced multiphoton transmission (photon-induced tunneling). As a result, nonclassical light sources can be generated on demand by sending coherent states into the proposed system. We calculate the second-order correlation function of the transmitted field and observe bunching and antibunching caused by the bound states. Furthermore, we demonstrate that the proposed system can produce photon pairs with a high degree of spectral entanglement, which have a large capacity for carrying information and are important for large-alphabet quantum communication.<br />Comment: 13+ pages, 7 figures
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. A 85, 043832 (2012)
- Publication Type :
- Report
- Accession number :
- edsarx.1202.2776
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevA.85.043832