Raman Storage of Quasideterministic Single Photons Generated by Rydberg Collective Excitations in a Low-Noise Quantum Memory
Year: 2022
Type: article
Abstract: We demonstrate the storage and retrieval of an on-demand single photon generated by a collective Rydberg excitation in a low-noise Raman quantum memory located in a different cold atomic ensemble. We generate single photons on demand by exciting a cold cloud of rubidium atoms off resonantly to a Rydberg state, with a generation probability up to 15% per trial. We then show that the single photons can be stored and retrieved with a storage-and-retrieval efficiency of 21% and a low noise floor in the Raman quantum memory. This leads to a signal-to-noise ratio ranging from 11 to 26 for the retrieved single photon, depending on the input-photon-generation probability, which allows us to observe significant antibunching. We also evaluate the performance of the Raman memory as a built-in unbalanced temporal beam splitter, tunable by varying the write-in control-pulse intensity. In addition, we demonstrate that the Raman memory can be used to control the single-photon wave shape. These results are a step forward in the implementation of efficient quantum repeater links using single-photon sources.
Source: Physical Review Applied
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Awards: G1175115578, G120905174, G1272927172, G1908469581, G2064873908, G210041235, G2262748287, G2355262757, G2575991346, G2601397997, G2713276326, G2763573136, G288263039, G2988934680, G3005324705, G300979063, G34346518, G3480869486, G357246561, G3681454997, G4042783231, G425668148, G434337789, Linking Nodes for The Quantum Internet, G5080475149, G5195188938, G531036588, G5852091828, ICFOstepstone PhD Programme for Early-Stage Researchers in Photonics, G6482940084, Disruptive Approaches to Atom-Light Interfaces, G6656126374, G69051668, G7084143925, G7425137858, G8180681537, G8637226926, G8684520763, G924867782
OpenAlex ID: W4290861272