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Journal Articles New Journal of Physics Year : 2021

Continuous variable multimode quantum states via symmetric group velocity matching

Victor Roman Rodriguez
B. Brecht
  • Function : Author
Eleni Diamanti

Abstract

Configurable and scalable continuous variable quantum networks for measurement-based quantum information protocols or multipartite quantum communication schemes can be obtained via parametric down conversion (PDC) in non-linear waveguides. In this work, we exploit symmetric group velocity matching (SGVM) to engineer the properties of the squeezed modes of the PDC. We identify type II PDC in a single waveguide as the best suited process, since multiple modes with non-negligible amount of squeezing can be obtained. We explore, for the first time, the waveguide dimensions, usually only set to ensure single-mode guiding, as an additional design parameter ensuring indistinguishability of the signal and idler fields. We investigate here potassium titanyl phosphate (KTP), which offers SGVM at telecommunications wavelengths, but our approach can be applied to any non-linear material and pump wavelength. This work paves the way towards the engineering of future large-scale quantum networks in the continuous variable regime.

Dates and versions

hal-03093484 , version 1 (03-01-2021)

Identifiers

Cite

Victor Roman Rodriguez, B. Brecht, S. Kaali, C. Silberhorn, N. Treps, et al.. Continuous variable multimode quantum states via symmetric group velocity matching. New Journal of Physics, 2021, 23 (4), pp.043012. ⟨10.1088/1367-2630/abef96⟩. ⟨hal-03093484⟩
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