Preservation of biphoton quantum coherence in frequency up-conversion using gas-filled hollow-core fibres

• Arturo MENA ^[1] ; Joseba ZUBIA ^[1] ; David Novoa ^[2]
  1. [1] Universidad del País Vasco/Euskal Herriko Unibertsitatea

     Universidad del País Vasco/Euskal Herriko Unibertsitatea

     Leioa, España

     
  2. [2] Ikerbasque, Fundación Vasca para la Ciencia

     Ikerbasque, Fundación Vasca para la Ciencia

     Bilbao, España

     
• Localización: Conectando la academia y la industria: Libro de actas OPTOEL 2023 / coord. por Alejandro Carballar Rincón, María del Rosario Fernández Ruiz, 2024
• Idioma: español
• Enlaces
  • Texto Completo Libro
• Resumen

  • We propose an experimental verification of the preservation of biphoton quantum coherence in the frequency up-conversion of one of the photons in the pair using a hollow antiresonant fibre filled with hydrogen. Raman coherence waves excited in the gas permit thresholdless spectral shifting of arbitrary quantum sources. Under the right conditions, this process can be very efficient, while keeping the fragile quantum correlations and overall coherence present in the original biphoton pair unaltered. We analyze how this situation could be assessed using two-photon Hong-Ou-Mandel interferometry. This work might have implications for modern quantum technologies relevant in communications, information processing and sensing.