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Highly efficient storage of cavity SPDC single photons in room temperature gradient echo memory

Authors :
Anthony C. Leung
W. Y. Sarah Lau
Aaron D. Tranter
Karun V. Paul
Markus Rambach
Ben C. Buchler
Ping Koy Lam
Andrew G. White
Till J. Weinhold
Source :
APL Quantum, Vol 1, Iss 3, Pp 036102-036102-7 (2024)
Publication Year :
2024
Publisher :
AIP Publishing LLC, 2024.

Abstract

Efficient quantum memories will be an essential building block of large-scale networked quantum systems and provide a link between flying photonic qubits and atomic or quasi-atomic local quantum processors. Memory efficiencies above 50% are required to be operating above the quantum no-cloning limit. High efficiency operation necessitates tailored photon source and memory pairs with matched bandwidths. In this paper, we explore the combination of an ultralow spectral bandwidth source of single photons from cavity-enhanced spontaneous parametric down-conversion with a hot gas-ensemble atomic memory. Our rubidium vapor gradient echo memory achieves 84% ± 3% recall efficiency of single photons: a record for single photon storage in a warm vapor platform that avoids bulky and complex systems, such as high vacuum and low temperature cryogenics.

Details

Language :
English
ISSN :
28350103
Volume :
1
Issue :
3
Database :
Directory of Open Access Journals
Journal :
APL Quantum
Publication Type :
Academic Journal
Accession number :
edsdoj.3e100874254590a38c360fda404448
Document Type :
article
Full Text :
https://doi.org/10.1063/5.0207712