Quantum Communication over Strong Atmospheric Turbulence Channels
Abstract
ABSTRACT:This equipment proposal is intended to augment several substantial ongoing activities at University of Arizona, supported by ONR MURI on Fundamental Research on Wavelength-Agile High-Rate-QKD in a Marine Environment and free-space optical (FSO) communication activities, supported in the past by NSF and AFOSR through STTR program. The first activity is related to investigation of agile QKD strategies that can automatically adjust for optimal performance in highly-variable environment encountered over the sea-deck. The second activityis related to various coding techniques to enable continuous variable (CV)-QKD and FSO communication over strong atmospheric turbulence channels. Proposed equipment will support experiments related to: (1) RF-assisted CV-QKD with secure key rates in order of Gb/s and (2) novel methods of multidimensional signaling based on spatial modes, in particular by photonangular momentum. Recent studies indicate that employment of multiple photon degrees of freedom, including orbital angular momentum (OAM), can dramatically improve photon information capacity and energy-efficiency of FSO links.In order to establish the testbed for Quantum Communication over Strong Atmospheric Turbulence Channels, we plan to develop an advanced outdoor FSO experimental setup at University of Arizona to provide a credible link between theoretical studies and experimental results. This testbed will be used in study of both quantum and classical FSO communication systems. For that purpose, purchase of an arbitrary waveform generator (AWG) with four channels, MEMS-based deformable mirror (BMC 492-DM), and Shack-Hartmann wavefrontsensor (SHWS) OMI-SWIR is required. Existing spatial light modulators have been already in use to generate and detect spatial modes as well as emulate atmospheric turbulence effects; while single photon detectors are used in discrete-variable (DV)-QKD experiments. The MEMS-based deformable mirror and SHWS will be used to deal with strong atmospheric turbulence effects, while AWG to generate multidimensional signal constellations for CV-QKD and classical communication applications. The NuCrypt four-channel correlated single photon detection system CPDS-1000-4 system, available in the Lab, will be used for quantum teleportation studies.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 10, 2018
- Source ID
- N000141812308
Entities
People
- Ivan B. Djordjevic
Organizations
- Office of Naval Research
- United States Navy
- University of Arizona