Abstract:
:A quantum network combines the benefits of quantum systems regarding secure information transmission and calculational speed-up by employing quantum coherence and entanglement to store, transmit and process information. A promising platform for implementing such a network are atom-based quantum memories and processors, interconnected by photonic quantum channels. A crucial building block in this scenario is the conversion of quantum states between single photons and single atoms through controlled emission and absorption. Here we present an experimental protocol for photon-to-atom quantum state conversion, whereby the polarization state of an absorbed photon is mapped onto the spin state of a single absorbing atom with >95% fidelity, while successful conversion is heralded by a single emitted photon. Heralded high-fidelity conversion without affecting the converted state is a main experimental challenge, in order to make the transferred information reliably available for further operations. We record >80 s(-1) successful state transfer events out of 18,000 s(-1) repetitions.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kurz C,Schug M,Eich P,Huwer J,Müller P,Eschner Jdoi
10.1038/ncomms6527subject
Has Abstractpub_date
2014-11-21 00:00:00pages
5527issn
2041-1723pii
ncomms6527journal_volume
5pub_type
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