Phys.org March 2, 2021
In the emerging field of quantum networking, the need for effective resource provisioning is particularly acute, given the generally lower power levels, higher sensitivity to loss, and inapplicability of optical detection and retransmission. A team of researchers in the US (Purdue University, Oak Ridge National Laboratory) has demonstrated reconfigurable distribution of quantum entanglement in a four-user tabletop network. By adaptively partitioning bandwidth with a single wavelength-selective switch, they successfully equalized two-party coincidence rates that initially differed by over two orders of magnitude. Their scalable approach introduces loss that is fixed with the number of users, offering a practical path for the establishment and management of quality-of-service guarantees in large quantum networks…read more. Open Access TECHNICAL ARTICLE
Network testbed for adaptive entanglement distribution. The inset shows the spread and scaling of channel losses for an alternative DWDM approach compared to the WSS. Credit: Optica Vol. 8, Issue 3, pp. 329-332, (2021) https://www.osapublishing.org/optica/fulltext.cfm?uri=optica-8-3-329&id=448715
Network testbed for adaptive entanglement distribution. The inset shows the spread and scaling of channel losses for an alternative DWDM approach compared to the WSS. Credit: Optica Vol. 8, Issue 3, pp. 329-332, (2021)