Investigating Quantum Information Storage Using Reversible Inhomogeneous Broadening in Rare Earth Ion Doped Materials

Research School of Physical Sciences and Engineering, Australian National University.

Tuesday, 17^th April 2007, 3.30PM, AGSE207, AGSE Building, Hawthorn.

Following the explosion of interest in quantum information processing the field has now reached the point where a quantum memory is becoming a real necessity for further improvements. The scheme for a quantum memory investigated in this talk involves reversible inhomogeneous broadening achieved via macroscopic electric field gradients. The advantage that this scheme has over its competitors is its simplicity. The scheme presented here requires no optical coupling beams and the only light interacting with the sample is the light to be stored. For that reason the scheme inherently suffers less from noise than other quantum memory proposals.

These advantages meant that it was possible to demonstrate the first optical memory using reversible inhomogeneous broadening via macroscopic electric field gradients. Presented in this talk will be the results achieved so far and a description of the simple improvements that will allow for storage efficiencies in the quantum regime.

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