Production of genuine multimode entanglement in circular waveguides with long-range coupling

T Anuradha, A Patra, R Gupta, A Rai, A Sen - Physical Review A, 2024 - APS
Starting with a product initial state, squeezed (squeezed coherent) state in one of the modes,
and vacuum in the rest, we report that a circular waveguide comprising modes coupled with …

Stimulated parametric down-conversion for spatiotemporal metrology

FS Roux - Physical Review A, 2021 - APS
A detailed analysis of the stimulated parametric down-conversion (PDC) process is
performed to investigate the effects of the spatiotemporal degrees of freedom. The analysis …

Versatile photonic entanglement synthesizer in the spatial domain

D Barral, M Walschaers, K Bencheikh, V Parigi… - Physical Review …, 2020 - APS
Multimode entanglement is an essential resource for quantum information in continuous-
variable systems. Light-based quantum technologies will arguably not be built upon table …

Quantum features of nonlinear coupler with competing nonlinearity

R Julius, ABMA Ibrahim, PK Choudhury, AN Alias… - Scientific Reports, 2022 - nature.com
In this work, we examine the quantum features of a multi-waveguide nonlinear coupler
exploiting the second-and third-order nonlinearities. The considered system contains four …

Quantum state engineering in arrays of nonlinear waveguides

D Barral, M Walschaers, K Bencheikh, V Parigi… - Physical Review A, 2020 - APS
In the current quest for efficient and experimentally feasible platforms for implementation of
multimode squeezing and entanglement in the continuous variable regime, we underpin …

Effect of group-velocity dispersion on the generation of multimode pulsed squeezed light in a synchronously pumped optical parametric oscillator

VA Averchenko, DM Malyshev… - New Journal of …, 2024 - iopscience.iop.org
Parametric down-conversion in a nonlinear crystal is a widely employed technique for
generating quadrature squeezed light with multiple modes, which finds applications in …

Spatiotemporal effects on squeezing measurements

FS Roux - Physical Review A, 2021 - APS
The role of the spatiotemporal degrees of freedom in the preparation and observation of
squeezed photonic states, produced by parametric down-conversion, is investigated. The …

Scalable multimode entanglement based on efficient squeezing of propagation eigenmodes

D Barral, K Bencheikh, JA Levenson, N Belabas - Physical Review Research, 2021 - APS
Continuous-variable encoding of quantum information in the optical domain has recently
yielded large temporal and spectral entangled states instrumental for quantum computing …

Reconfigurable generation of spatial entanglement in nonlinear waveguide arrays

A Raymond, A Zecchetto, J Palomo, M Morassi… - arxiv preprint arxiv …, 2024 - arxiv.org
Harnessing high-dimensional entangled states of light presents a frontier for advancing
quantum information technologies, from fundamental tests of quantum mechanics to …

Minimum resources for versatile continuous-variable entanglement in integrated nonlinear waveguides

D Barral, K Bencheikh, V d'Auria, S Tanzilli, N Belabas… - Physical Review A, 2018 - APS
In a recent paper [Barral, Phys. Rev. A 96, 053822 (2017) 2469-9926 10.1103/PhysRevA.
96.053822], we proposed a strategy to generate bipartite and quadripartite continuous …