Few-cycle vacuum squeezing in nanophotonics

Abstract

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

8 pages, 4 figures

References in corpus (8)

• Quantum Computing
• Photonic quantum technologies
• Quantum circuits with many photons on a programmable nanophotonic chip
• Probing multimode squeezing with correlation functions
• Few-cycle vacuum squeezing in nanophotonics
• Femtojoule, femtosecond all-optical switching in lithium niobate nanophotonics
• Ultra-broadband quadrature squeezing with thin-film lithium niobate nanophotonics
• 43-GHz bandwidth real-time amplitude measurement of 5-dB squeezed light using modularized optical parametric amplifier with 5G technology

Cited by in corpus (8)

• Few-cycle vacuum squeezing in nanophotonics
• Integrated Quantum Optical Phase Sensor
• 43-GHz bandwidth real-time amplitude measurement of 5-dB squeezed light using modularized optical parametric amplifier with 5G technology
• Quantum nondemolition measurements with optical parametric amplifiers for ultrafast universal quantum information processing
• Wigner Function Tomography via Optical Parametric Amplification
• Creating large Fock states and massively squeezed states in optics using systems with nonlinear bound states in the continuum
• Programmable time-multiplexed squeezed light source
• Broadband biphoton generation and polarization splitting in a monolithic AlGaAs chip