Spectrally shaped and pulse-by-pulse multiplexed multimode squeezed states of light

TL;DR

This paper demonstrates the simultaneous generation of 21 spectrally and temporally multiplexed squeezed light modes using ultrafast shaping, advancing scalable and reconfigurable multipartite quantum states for quantum technologies.

Contribution

It introduces a novel method combining frequency- and time-multiplexing in multimode squeezing, enabling scalable generation of multipartite entangled states.

Findings

Generated 21 squeezed spectral modes at 156 MHz

Combined frequency- and time-multiplexing in multimode squeezing

Paves the way for scalable, reconfigurable quantum states

Abstract

Spectral- and time- multiplexing are currently explored to generate large multipartite quantum states of light for quantum technologies. In the continuous variable approach, the deterministic generation of large entangled states demands the generation of a large number of squeezed modes. Here, we demonstrate the simultaneous generation of 21 squeezed spectral modes at 156 MHz. We exploit the full repetition rate and the ultrafast shaping of a femtosecond light source to combine, for the first time, frequency- and time- multiplexing in multimode squeezing. This paves the way to the implementation of multipartite entangled states that are both scalable and fully reconfigurable.