57 research outputs found
Photon-Mediated Interaction between Two Distant Atoms
We study the photonic interactions between two distant atoms which are
coupled by an optical element (a lens or an optical fiber) focussing part of
their emitted radiation onto each other. Two regimes are distinguished
depending on the ratio between the radiative lifetime of the atomic excited
state and the propagation time of a photon between the two atoms. In the two
regimes, well below saturation the dynamics exhibit either typical features of
a bad resonator, where the atoms act as the mirrors, or typical characteristics
of dipole-dipole interaction. We study the coherence properties of the emitted
light and show that it carries signatures of the multiple scattering processes
between the atoms. The model predictions are compared with the experimental
results in J. Eschner {\it et al.}, Nature {\bf 413}, 495 (2001).Comment: 18 pages, 15 figure
Heralded photonic interaction between distant single ions
We establish heralded interaction between two remotely trapped single 40Ca+
ions through the exchange of single photons. In the sender ion, we release
single photons with controlled temporal shape on the P_3/2 to D_5/2 transition
and transmit them to the distant receiver ion. Individual absorption events in
the receiver ion are detected by quantum jumps. For continuously generated
photons, the absorption reduces significantly the lifetime of the long-lived
D_5/2 state. For triggered single-photon transmission, we observe coincidence
between the emission at the sender and quantum jump events at the receiver.Comment: 5 pages, 4 figures. v2: number on p. 3, bottom, correcte
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