Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Discriminating Orthogonal Single-Photon Images, Curtis J. Broadbent, Petros Zerom, Heedeuk Shin, John C. Howell, Robert W. Boyd
Discriminating Orthogonal Single-Photon Images, Curtis J. Broadbent, Petros Zerom, Heedeuk Shin, John C. Howell, Robert W. Boyd
Mathematics, Physics, and Computer Science Faculty Articles and Research
We can encode an image from an orthogonal basis set onto a single photon from a downconverted pair via the use of an amplitude mask. We can then discriminate the image imprinted on the photon from other images in the set using holographic-matched filtering techniques. We demonstrate this procedure experimentally for an image space of two objects, and we discuss the possibility of applying this method to a much larger image space. This process could have important implications for the manipulation of images at the quantum level.
Preservation Of Energy-Time Entanglement In A Slow Light Medium, Curtis J. Broadbent, Ryan M. Camacho, Ran Xin, John C. Howell
Preservation Of Energy-Time Entanglement In A Slow Light Medium, Curtis J. Broadbent, Ryan M. Camacho, Ran Xin, John C. Howell
Mathematics, Physics, and Computer Science Faculty Articles and Research
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.
Storage And Retrieval Of Multimode Transverse Images In Hot Atomic Rubidium Vapor, Praveen K. Vudyasetu, Ryan M. Camacho, John C. Howell
Storage And Retrieval Of Multimode Transverse Images In Hot Atomic Rubidium Vapor, Praveen K. Vudyasetu, Ryan M. Camacho, John C. Howell
Mathematics, Physics, and Computer Science Faculty Articles and Research
We report on the experimental realization of the storage of images in a hot vapor of Rubidium atoms. The images are stored in and retrieved from the long-lived ground state atomic coherences. We show that an image impressed onto a 500 ns pulse can be stored and retrieved up to 30 μs later. The image storage is made robust to diffusion by storing the Fourier transform of the image.