Evaluation of Quantum Correlations for use in Quantum Radar and Quantum Communication Systems
Open Access
- Author:
- Bowell, Rory
- Graduate Program:
- Electrical Engineering (PHD)
- Degree:
- Doctor of Philosophy
- Document Type:
- Dissertation
- Date of Defense:
- February 22, 2023
- Committee Members:
- Madhavan Swaminathan, Program Head/Chair
Matthew J Brandsema, Special Member
Sahin Ozdemir, Outside Unit & Field Member
Ram Narayanan, Chair & Dissertation Advisor
Xingjie Ni, Major Field Member
Tim Kane, Major Field Member
Jonathan Dilger, Special Member
Stephen Howell, Special Member - Keywords:
- Quantum Radar
Quantum Communication
Radar
Remote Sensing
SPDC - Abstract:
- Classical technologies have been used for decades in the radar and communication applications. While it is understood that classical radar and communication are functional, we are approaching the limits to which they can be improved. As technology improvements bring us close to these limits, it is necessary to utilize new approaches to stop counter technologies from deeming it irrelevant. One of the solutions that has been proposed to this problem is to use quantum correlations to improve the performance of classical systems. Unlike classical systems, quantum systems have the ability to correlate at the photon level due to the ability to generate two photons at the same time. This ability to correlate waveforms at a photon level has been shown to have many dB of improvement in the low signal-to-noise ratio regime over classical sensing systems. This dissertation will analyze two types of quantum radar systems, bipartite and tripartite. It will also explore the various correlation coefficients for different types of quantum radar measurement schemes. For the bipartite system it will explore methods such as: (i) immediate detection of the idler photon events to be used in post-processing correlation with the signal photon events, (ii) immediate detection of the idler electric field to be used in post-processing correlation with the signal electric field, (iii) immediate detection of the idler quadratures to be used in post-processing correlation with the signal quadratures. The thesis will also attempt to solve a tripartite correlation where two lasers are used to created two signal photons and an idler photon. This system will be explored with basic electric field measurements and a derivation of the photon counting measurement. The showcased results compare the performance of these different methodologies for various environmental scenarios. This work is important at developing the fundamentals behind quantum technologies that require covariance measurements and will permit more accurate selection of the appropriate measurement styles for individual systems.