Mapping multiple photonic qubits into and out of one solid-state atomic ensemble

Imam Usmani, Mikael Afzelius (), Hugues de Riedmatten () and Nicolas Gisin
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Imam Usmani: Group of Applied Physics, University of Geneva
Mikael Afzelius: Group of Applied Physics, University of Geneva
Hugues de Riedmatten: Group of Applied Physics, University of Geneva
Nicolas Gisin: Group of Applied Physics, University of Geneva

Nature Communications, 2010, vol. 1, issue 1, 1-7

Abstract: Abstract The future challenge of quantum communication is scalable quantum networks, which require coherent and reversible mapping of photonic qubits onto atomic systems (quantum memories). A crucial requirement for realistic networks is the ability to efficiently store multiple qubits in one quantum memory. In this study, we show a coherent and reversible mapping of 64 optical modes at the single-photon level in the time domain onto one solid-state ensemble of rare-earth ions. Our light–matter interface is based on a high-bandwidth (100 MHz) atomic frequency comb, with a predetermined storage time of ≳1 μs. We can then encode many qubits in short (

Date: 2010
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DOI: 10.1038/ncomms1010

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