Qubit transfer between photons at telecom and visible wavelengths in a slow-light atomic medium

Details Qubit transfer between photons at telecom and visible wavelengths in a slow-light atomic medium Qubit transfer between photons at telecom and visible wavelengths in a slow-light atomic medium

2009-12-08

arxiv.org/abs/0912.1551v1

Physics

Quantum Physics

4 pages, 1 figure, submitted to Phys. Rev. A

Scientific paper

We propose a method that enables efficient conversion of quantum information frequency between different regions of spectrum of light based on recently demonstrated strong parametric coupling between two narrow-band single-photon pulses propagating in a slow-light atomic medium [1]. We show that an input qubit at telecom wavelength is transformed into another at visible domain in a lossless and shape-conserving manner while keeping the initial quantum coherence and entanglement. These transformations can be realized with a quantum efficiency close to its maximum value.

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