Seaworthy Quantum Key Distribution Design and Validation (SEAKEY)
Quarterly rept. 26 Apr-4 Aug 2015
RAYTHEON CO CAMBRIDGE MA BBN TECHNOLOGIES
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In this report we summarize the technical progress accomplished during the first quarter of the second year of the SeaKey program. Our progress stems from our year 1 work on the program executing tasks 1 and 2. The two major tasks we are executing this year, identified in figure 1, are 1 designing a proposed implementation for a freespace QKD link optimized for operation in a naval environment and 2 calculating the achievable key rate of the aforementioned QKD link in realistic environmental conditions. This quarter we have evaluated literature which calculates key rates of CV QKD systems, primarily as a function of realistic receiver parameters. Subsequently, we have constructed our own models for CV QKD rate calculations, awaiting parameterization from experimental results from our own laboratory, or from guidance from ONR. This report contains a technical memo from Boulat Bash describing the details of the homodyne receiver model under construction. In an effort to meet the aggressive key rates required by ONR for the QKD system under study our team continues to evaluate limits of multi-spatial QKD systems, using multiple Gaussian beams to provide a linear increase to the key rates achievable in free-space, when rates for a single mode are limited by loss and noise. This report also contains a technical memo from Boulat Bash describing the details of the multi-mode analysis being performed in collaboration with Jeff Shapiro at MIT.
- Operations Research
- Computer Systems Management and Standards
- Non-Radio Communications