Few-cycle vacuum squeezing in nanophotonics

• DOI: 10.1126/science.abo6213
• Publication Date: 2022-09-15T17:58:42Z
• Authors: Rajveer Nehra; Ryoto Sekine; Luis Ledezma; Qiushi Guo; Robert M. Gray; Arkadev Roy; Alireza Marandi
• Keywords: Nanophotonics

One of the most fundamental quantum states light is squeezed vacuum, in which noise one quadratures less than standard limit. Significant progress has been made generation optical vacuum and its utilization for numerous applications. However, it remains challenging to generate, manipulate, measure such nanophotonics with performances required a wide range scalable information systems. Here, we overcome this challenge lithium niobate by utilizing ultrashort-pulse phase-sensitive amplifiers both all-optical measurement on same chip. We generate state spanning over more 25 THz bandwidth supporting only few cycles, maximum 4.9 dB squeezing ($\sim$11 inferred). This level surpasses requirements Our results few-optical-cycle enable practical path towards systems clock rates open opportunities studying non-classical nature sub-cycle regime.