spontaneous

Physics

Observation of gain-induced group delay between multiphoton pulses generated in spontaneous downconversion sources

Deformation of the shape of a photon pair as the spontaneous parametric downconversion interaction strength increases (from left to right). Credit: Thekkadath et al. Spontaneous parametric downconversion (SPDC) and spontaneous four-wave mixing are powerful nonlinear optical processes that can generate multiphoton light beams with unique quantum properties. These processes can be exploited to create a variety of quantum technologies, such…