[PAST EVENT] Physics Colloquium

February 6, 2015
4pm - 5pm
Small Hall, Room 110
300 Ukrop Way
Williamsburg, VA 23185Map this location
I will present some recent work on the generation and control of highly entangled beams of light, known as twin beams. The quantum correlations present in twin beams have recently generated great interest due to their applications in quantum information, quantum imaging, and quantum computing.
In this talk I will show that non-degenerate four-wave mixing (FWM) in a rubidium vapor cell is an excellent source of continuous-variable (CV) entangled twin beams, with an intensity-difference noise of less than 13% of the corresponding classical shot-noise level. Unlike other systems that rely on the use of a cavity, this system can support a large number of spatial modes. This leads to spatial quantum correlations and makes it possible to produce CV entangled images. I will describe some resent experiments in which we study the effect of the size and profile of the pump required for the FWM on the minimum size of the spatial correlations, or coherence area.

Host: Prof. E. Mikhailov