Raman quantum memory with built-in suppression of four-wave-mixing noise

S. E. Thomas, T. M. Hird, J. H.D. Munns, B. Brecht, D. J. Saunders, J. Nunn, I. A. Walmsley, P. M. Ledingham

Research output: Contribution to journalArticle

Abstract

Quantum memories are essential for large-scale quantum information networks. Along with high efficiency, storage lifetime, and optical bandwidth, it is critical that the memory adds negligible noise to the recalled signal. A common source of noise in optical quantum memories is spontaneous four-wave mixing. We develop and implement a technically simple scheme to suppress this noise mechanism by means of quantum interference. Using this scheme with a Raman memory in warm atomic vapor, we demonstrate over an order of magnitude improvement in noise performance. Furthermore we demonstrate a method to quantify the remaining noise contributions and present a route to enable further noise suppression. Our scheme opens the way to quantum demonstrations using a broadband memory, significantly advancing the search for scalable quantum photonic networks.

Original languageEnglish
Article number033801
JournalPhysical Review A
Volume100
Issue number3
DOIs
Publication statusPublished - 3 Sep 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Thomas, S. E., Hird, T. M., Munns, J. H. D., Brecht, B., Saunders, D. J., Nunn, J., ... Ledingham, P. M. (2019). Raman quantum memory with built-in suppression of four-wave-mixing noise. Physical Review A, 100(3), [033801]. https://doi.org/10.1103/PhysRevA.100.033801

Raman quantum memory with built-in suppression of four-wave-mixing noise. / Thomas, S. E.; Hird, T. M.; Munns, J. H.D.; Brecht, B.; Saunders, D. J.; Nunn, J.; Walmsley, I. A.; Ledingham, P. M.

In: Physical Review A, Vol. 100, No. 3, 033801, 03.09.2019.

Research output: Contribution to journalArticle

Thomas, SE, Hird, TM, Munns, JHD, Brecht, B, Saunders, DJ, Nunn, J, Walmsley, IA & Ledingham, PM 2019, 'Raman quantum memory with built-in suppression of four-wave-mixing noise', Physical Review A, vol. 100, no. 3, 033801. https://doi.org/10.1103/PhysRevA.100.033801
Thomas, S. E. ; Hird, T. M. ; Munns, J. H.D. ; Brecht, B. ; Saunders, D. J. ; Nunn, J. ; Walmsley, I. A. ; Ledingham, P. M. / Raman quantum memory with built-in suppression of four-wave-mixing noise. In: Physical Review A. 2019 ; Vol. 100, No. 3.
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