Deterministic quantum state transfer from an electronic charge qubit to a photonic polarization qubit

Ament, L. J. P.; Beenakker, C. W. J.

Deterministic quantum state transfer from an electronic charge qubit to a photonic polarization qubit

Authors

Description

Building on an earlier proposal for the production of polarization-entangled microwaves by means of intraband transitions in a pair of quantum dots, we show how this device can be used to transfer an unknown single-qubit state from electronic charge to photonic polarization degrees of freedom. No postselection is required, meaning that the quantum state transfer happens deterministically. Decoherence of the charge qubit causes a non-monotonic decay of the fidelity of the transferred state with increasing decoherence rate.
3 pages, 3 figures