121 citations · 992 across the 38 of their papers we have counts for
6 papers · 1 filter
Finite-round quantum error correction on symmetric quantum sensors
Yingkai Ouyang, Gavin K. Brennen
In quantum sensing using entangled probes, the variance of the estimated signal strength scales like at the Heisenberg limit, which is a quadratic improvem…
Tight Cramér-Rao type bounds for multiparameter quantum metrology through conic programming
Masahito Hayashi, Yingkai Ouyang
In the quest to unlock the maximum potential of quantum sensors, it is of paramount importance to have practical measurement strategies that can estimate incompatible parameters wi…
Learning quantum graph states with product measurements
Yingkai Ouyang, Marco Tomamichel
We consider the problem of learning identical copies of an unknown -qubit quantum graph state with product measurements. These graph states have corresponding graphs where e…
Privacy and correctness trade-offs for information-theoretically secure quantum homomorphic encryption
Yanglin Hu, Yingkai Ouyang, Marco Tomamichel
Quantum homomorphic encryption, which allows computation by a server directly on encrypted data, is a fundamental primitive out of which more complex quantum cryptography protocols…
Permutational-key quantum homomorphic encryption with homomorphic quantum error-correction
Yingkai Ouyang, Peter P. Rohde
The gold-standard for security in quantum cryptographic protocols is information-theoretic security. Information-theoretic security is surely future-proof, because it makes no assu…
Imaging stars with quantum error correction
Zixin Huang, Gavin K. Brennen, Yingkai Ouyang
The development of high-resolution, large-baseline optical interferometers would revolutionize astronomical imaging. However, classical techniques are hindered by physical limitati…