Author Archives: Yanglin Hu

Fundamental limits on quantum cloning from the no-signalling principle

The no-cloning theorem states that within the framework of quantum mechanics, there does not exist any universal procedure that can replicate an unknown quantum state reliably. This fundamental principle was initially formalized in 1982 and later extended in various directions. … Continue reading

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Privacy and correctness trade-offs for information-theoretically secure quantum homomorphic encryption

Homomorphic encryption, which allows a server to compute on encrypted data of a client without first decrypting it, is like a “Swiss army knife” of classical cryptography. Namely, by treating homomorphic encryption as a cryptographic primitive, a broad range of … Continue reading

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