Ultrafast time-division demultiplexing of polarization-entangled photons

Abstract

Maximizing the information transmission rate through quantum channels is essential for practical implementation of quantum communication. Time-division multiplexing is an approach for which the ultimate rate requires the ability to manipulate and detect single photons on ultrafast timescales while preserving their quantum correlations. Here we demonstrate the demultiplexing of a train of pulsed single photons using time-to-frequency conversion while preserving their polarization entanglement with a partner photon. Our technique converts a pulse train with 2.69 ps spacing to a frequency comb with 307 GHz spacing which may be resolved using diffraction techniques. Our work enables ultrafast multiplexing of quantum information with commercially available single-photon detectors.

4 pages main body, 2 pages references, 5 pages supplemental material. 4 figures in main body, 2 figures and 2 tables in supplemental material

References in corpus (3)

• A Quantum Pulse Gate based on Spectrally Engineered Sum Frequency Generation
• Experimental violation of Svetlichny's inequality
• Quantum-inspired interferometry with chirped laser pulses

Cited by in corpus (8)

• Frequency-encoded photonic qubits for scalable quantum information processing
• Quantum frequency conversion between infrared and ultraviolet
• Theory of high-efficiency sum-frequency generation for single-photon waveform conversion
• Ultratunable quantum frequency conversion in photonic crystal fiber
• Generation of tunable quantum entanglement via nonlinearity symmetry breaking in semiconductor metasurfaces
• Nonlinear Domain Engineering for Quantum Technologies
• Group-velocity symmetry in photonic crystal fibre for ultra-tunable quantum frequency conversion
• Witnessing latent time correlations with a single quantum particle