Preservation of Energy-Time Entanglement in a Slow Light Medium

Authors

Curtis J. Broadbent, University of Rochester
Ryan M. Camacho, University of Rochester
Ran Xin, University of Rochester
John C. Howell, Chapman UniversityFollow

Document Type

Article

Publication Date

4-4-2008

Abstract

We demonstrate the preservation of entanglement of an energy-time entangled biphoton through a slow light medium. Using the D1 and D2 fine structure resonances of Rubidium, we delay one photon of the 1.5 THz biphoton by ∼1.3 correlation lengths and measure the fourth order correlation fringes. After the group delay the fringe visibility is reduced from 97.0±4.4% to 80.0±4.8%, but is still sufficient to violate a Bell inequality. We show that temporal broadening is the primary mechanism for reducing the fringe visibility and that smaller bandwidths lead to greatly reduced broadening.

Comments

This article was originally published in Physical Review Letters, volume 100, issue 13, in 2008. https://doi.org/10.1103/PhysRevLett.100.133602

Recommended Citation

C. J. Broadbent, R. M. Camacho, R. Xin, and J. C. Howell,Preservation of Energy-Time Entanglement in a Slow Light Medium, Phys. Rev. Lett. 100(13), 133602.

Peer Reviewed

1

Copyright

American Physical Society