סמינר: The Jacob Ziv Communication and Information Theory seminar
Covert Entanglement Generation and Secrecy
Date:
August,07,2025
Start Time:
14:30 - 15:30
Location:
1061, Meyer Building
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Lecturer:
Ohad Kimelfeld
Research Areas:
| Quantum communication harnesses the principles of quantum mechanics to enable fundamen-tally new forms of information transfer, with applications ranging from secure data transmission to distributed quantum computing. A central feature of quantum communication is the use of entanglement, whose generation and distribution are essential for enabling these capabilities. Privacy is a fundamental aspect of communication: while secrecy guarantees that the trans-mitted information remains inaccessible to an adversary, covert communication ensures that the very act of transmission remains undetectable. These are distinct requirements – covert communication does not necessarily imply secrecy, and vice versa. The covertness requirement significantly limits throughput: in the covert setting, the amount of information that can be transmitted reliably follows a square-root law, allowing only O(√n) (qu)bits over n channel uses. In this work, we determine the covert capacity for entanglement generation over a noisy quantum channel. We begin by analyzing the problem of covert communication of classical in-formation under a secrecy constraint. We then leverage this result to construct a coding scheme for covert entanglement generation. Specifically, we establish that O(√n) Einstein-Podolsky-Rosen (EPR) pairs can be distributed covertly and reliably over n channel uses. Consequently, the covert entanglement-generation capacity is the same as for classical information without secrecy, albeit our scheme requires a larger classical key. M.Sc. student under the supervision of Prof. Uzi Pereg.
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