Quantum enhanced fiber network sensing and tomography
Abstract
Approved for Public Release: To date, all quantum sensing experiments are performed to show local measurement sensitivity improvement, either with a single sensor node or multiple local nodes. Remotely distributed sensing systems are highly preferred, and even imperative for applications when it is challenging to perform on-site measurements. In this project, we will develop a remotely distributed sensing system based on fiber networks enhanced by quantum entanglement. This remotely distributed quantum-enhanced sensing network will boost the sensitivity of measuring, e.g., mechanical, thermal, and electrical signals for critical naval applications. We will use continuous-variable entanglement built from squeezed light sources and linear photonic circuits. This will be achieved by distributing multi-site quantum entanglement across a campus-wide fiber network at the University of Arizona and performing collective measurements at multiple remote sensor sites. This remotely distributed quantum-enhanced sensing network will enable obtaining a given fidelity of signal detection and processing with a much smaller integration time and expended optical power level than a classical sensing network. Besides detecting external signals, the distributed quantum-enhanced sensing technology can also be used for network tomography, such as measuring the intrinsic properties of the fiber network including the loss and dispersion of each fiber link. Examples of network-tomography tasks of potential interest to the US Navy includes: (a) quick detection of topology changes, e.g., caused due to link failures, in a hybrid free-space/fiber dynamic environment, and (b) assessment of communication channel quality between two distant users connected by a multi-hop network without probing the intermediary nodes.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 11, 2023
- Source ID
- N000142312784
Entities
People
- Saikat Guha
Organizations
- Office of Naval Research
- United States Navy
- University of Arizona