Abstract
We prepare a maximally entangled state of two ions and couple both ions to the mode of an optical cavity. The phase of the entangled state determines the collective interaction of the ions with the cavity mode, that is, whether the emission of a single photon into the cavity is suppressed or enhanced. By adjusting this phase, we tune the ion-cavity system from sub- to superradiance. We then encode a single qubit in the two-ion superradiant state and show that this encoding enhances the transfer of quantum information onto a photon.
- Received 26 August 2014
DOI:https://doi.org/10.1103/PhysRevLett.114.023602
© 2015 American Physical Society
Synopsis
A Cavity Just for Two
Published 14 January 2015
Two groups have independently isolated two atoms in a single cavity and measured that the collective light output is not simply the sum of single emitters.
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