Quantum State Transfer between Matter and Light

We report on the coherent quantum state transfer from a two-level atomic system to a single photon. Entanglement between a single photon (signal) and a two-component ensemble of cold rubidium atoms is used to project the quantum memory element (the atomic ensemble) onto any desired state by measurin...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Science (American Association for the Advancement of Science) 2004-10, Vol.306 (5696), p.663-666
Hauptverfasser:	Matsukevich, D. N., Kuzmich, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Atoms Atoms & subatomic particles Coincidence Communication (Thought Transfer) Conditional probabilities Correlations Exact sciences and technology Fundamental areas of phenomenology (including applications) Information Processing Ions Light Matter & antimatter Memory Nonclassical field states squeezed, antibunched and sub-poissonian states operational definitions of the phase of the field phase measurements Optics Photons Physics Propagation delay Quantum computing Quantum entanglement Quantum optics Quantum states Signal detection
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	We report on the coherent quantum state transfer from a two-level atomic system to a single photon. Entanglement between a single photon (signal) and a two-component ensemble of cold rubidium atoms is used to project the quantum memory element (the atomic ensemble) onto any desired state by measuring the signal in a suitable basis. The atomic qubit is read out by stimulating directional emission of a single photon (idler) from the (entangled) collective state of the ensemble. Faithful atomic memory preparation and readout are verified by the observed correlations between the signal and the idler photons. These results enable implementation of distributed quantum networking.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.1103346