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IEEE/LEOS Summer Topical Meetings

Quantum communication with ultrafast multimode pulsed light

Andreas Christ, Benjamin Brecht, Georg Harder, A. Eckstein, Vahid Ansari, Cosmo Lupo, Christine Silberhorn

Published Jul 1, 2013• 0 citations
Publisher

Abstract

Using ultrafast multimode PDC sources and optical quantum pulse gates based on engineered frequency conversion processes we introduce multiplexed quantum information coding and show that it enables an exponential increase in the achievable quantum communication rate.
DOI
10.1109/phosst.2013.6614559

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Quantum information applications call for information encoding schemes which offer high bitrates and the possibility to encode many qubits onto one carrier. Ultrafast pulsed quantum states of light feature an inherent rich spectral and temporal broadband mode structure, which is uniquely defined by their generation process. In ultrafast parametric downconversion for instance, the pair photons are usually generated in superposition states of many orthogonal broadband modes. Thus, they carry the potential for high dimensional quantum information encoding and high bitrates. However, even though the pulsed mode structure of quantum light is well known (see e.g. [1]), feasible ways of exploiting this natural resource in practical systems have not yet been explored.
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