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

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

2006-02-07

arxiv.org/abs/cond-mat/0602176v1

Phys. Rev. B 73, 121307(R) (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures

Scientific paper

10.1103/PhysRevB.73.121307

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.

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