57 research outputs found
Non-separated states from squeezed dark-state polaritons in electromagnetically-induced-transparency media
Within the frame of quantized dark-state polaritons in
electromagnetically-induced-transparency media, noise fluctuations in the
quadrature components are studied. Squeezed state transfer, quantum
correlation, and noise entanglement between probe field and atomic polarization
are demonstrated in single- and double- configurations, respectively.
Even though a larger degree of squeezing parameter in the continuous variable
helps to establish stronger quantum correlations, inseparability criterion is
satisfied only within a finite range of squeezing parameter. The results
obtained in the present study may be useful for guiding experimental
realization of quantum memory devices for possible applications in quantum
information and computation.Comment: 12 pages, 7 figure
Hiding Single Photons With Spread Spectrum Technology
We describe a proof-of-principal experiment demonstrating the use of spread
spectrum technology at the single photon level. We show how single photons with
a prescribed temporal shape, in the presence of interfering noise, may be
hidden and recovered.Comment: 4 pages, 5 figures
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