Tailoring nonlinear processes for quantum optics with pulsed temporal-mode encodings

摘要: The time-frequency degree of freedom is a powerful resource for implementing high-dimensional quantum information processing. In particular, field-orthogonal pulsed temporal modes offer flexible framework compatible with both long-distance fibre networks and integrated waveguide devices. order this architecture to be fully utilised, techniques reliably generate diverse states light accurately measure complex waveforms must developed. To end, nonlinear processes mediated by spectrally shaped pump pulses in group-velocity engineered waveguides crystals provide capable toolbox. review, we examine how tailoring the phasematching conditions parametric downconversion sum-frequency generation allows highly pure single-photon generation, temporal-mode entanglement, accurate measurement photon states. We an overview experimental progress towards these goals, summarise challenges that remain field.