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Optimal Measurements for Symmetric Quantum States with Applications to Optical Communication
Hari Krovi, Saikat Guha, Zachary Dutton +1
The minimum probability of error (MPE) measurement discriminates between a set of candidate quantum states with the minimum average error probability allowed by quantum mechanics.…
Hiding Information in Noise: Fundamental Limits of Covert Wireless Communication
Boulat A. Bash, Dennis Goeckel, Saikat Guha +1
Widely-deployed encryption-based security prevents unauthorized decoding, but does not ensure undetectability of communication. However, covert, or low probability of detection/int…
Practical Quantum Repeaters with Parametric Down-Conversion Sources
Hari Krovi, Saikat Guha, Zachary Dutton +3
Conventional wisdom suggests that realistic quantum repeaters will require quasi-deterministic sources of entangled photon pairs. In contrast, we here study a quantum repeater arch…
Fundamental rate-loss tradeoff for optical quantum key distribution
Masahiro Takeoka, Saikat Guha, Mark M. Wilde
Since 1984, various optical quantum key distribution (QKD) protocols have been proposed and examined. In all of them, the rate of secret key generation decays exponentially with di…
Microwave Quantum Illumination
Shabir Barzanjeh, Saikat Guha, Christian Weedbrook +3
Quantum illumination is a quantum-optical sensing technique in which an entangled source is exploited to improve the detection of a low-reflectivity object that is immersed in a br…