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quant-ph2016★ 3 cited
Quantum Key Distribution Using Multiple Gaussian Focused Beams
Boulat A. Bash, Nivedita Chandrasekaran, Jeffrey H. Shapiro +1
The secret key rate attained by a free-space QKD system in the {\em near-field} propagation regime (relevant for - km range using cm radii transmit and receive a…
quant-ph2016
Fundamental Limits of Covert Communication over Classical-Quantum Channels
Michael S. Bullock, Azadeh Sheikholeslami, Mehrdad Tahmasbi +3
We investigate covert communication over general memoryless classical-quantum channels with fixed finite-size input alphabets. We show that the square root law (SRL) governs covert…