Multiplexed communication over a high-speed quantum channel

Abstract

In quantum information systems it is of particular interest to consider the best way in which to use the non-classical resources consumed by that system. Quantum communication protocols are integral to quantum information systems and are amongst the most promising near-term applications of quantum information science. Here we show that a multiplexed, digital quantum communications system supported by comb of vacuum squeezing has a greater channel capacity per photon than a source of broadband squeezing with the same analogue bandwidth. We report on the time-resolved, simultaneous observation of the first dozen teeth in a 2.4 GHz comb of vacuum squeezing produced by a sub-threshold OPO, as required for such a quantum communications channel. We also demonstrate multiplexed communication on that channel.

References in corpus (5)

• The Quantum Internet
• Experimental quantum teleportation
• Resource-efficient linear optical quantum computation
• Quantum engineering of squeezed states for quantum communication and metrology
• Experimental demonstration of entanglement assisted coding using a two-mode squeezed vacuum state

Cited by in corpus (4)

• A balanced homodyne detector for high-rate Gaussian-modulated coherent-state quantum key distribution
• Quantum internet using code division multiple access
• Quantum Communication using Code Division Multiple Access Network
• Cross talk compensation in multimode continuous-variable entanglement distribution