RESEARCH FROM ARMENIAN NATIONAL ACADEMY OF SCIENCE YIELDS NEW FINDINGS ON PHYSICS

News of Science
April 11, 2010

"We propose a method that enables efficient conversion of the quantum
information frequency between different regions of a spectrum of light
based on recently demonstrated strong parametric coupling between
two narrow-band single-photon pulses propagating in a slow-light
atomic medium [N. Sisakyan and Yu. Malakyan, Phys. Rev," scientists
in Yerevan, Armenia report.

"A, 75, 063831 (2007)]. We show that an input qubit at telecom
wavelength is transformed into another at a visible domain in
a lossless and shape-conserving manner while keeping the initial
quantum coherence and entanglement," wrote A. Gogyan and colleagues,
Armenian National Academy of Science.

The researchers concluded: "These transformations can be realized
with a quantum efficiency close to its maximum value."

Gogyan and colleagues published their study in Physical Review a
(Qubit transfer between photons at telecom and visible wavelengths
in a slow-light atomic medium. Physical Review a, 2010;81(2):4304).

For more information, contact A. Gogyan, Armenian Natl Academy Sci,
Inst Physics Res, Ashtarak 2, Yerevan 0203, Armenia.

Publisher contact information for the journal Physical Review a
is: American Physical Society, One Physics Ellipse, College Pk,
MD 20740-3844, USA.