Learning properties of quantum states without the IID assumption

O Fawzi, R Kueng, D Markham, A Oufkir - Nature Communications, 2024 - nature.com
We develop a framework for learning properties of quantum states beyond the assumption of
independent and identically distributed (iid) input states. We prove that, given any learning …

Characterizing non-Markovian off-resonant errors in quantum gates

KX Wei, E Pritchett, DM Zajac, DC McKay, S Merkel - Physical Review Applied, 2024 - APS
As quantum gates improve, it becomes increasingly difficult to characterize the remaining
errors. Here we describe a class of coherent non-Markovian errors—excitations due to an off …

Eigenvalue-based quantum state verification of three-qubit W class states

D Bao, M Liu, Y Ou, Q Xu, Q Li, X Tan - Physica A: Statistical Mechanics …, 2024 - Elsevier
In quantum many-body systems, W class states are typical examples of states with genuine
multipartite entanglement. They have been found to be valuable resources in many quantum …

Efficient verification of two-colorable graph states

Q Xu, X Tan, Y Ou, D Bao, R Huang - Physical Review A, 2024 - APS
Graph states known as the resource states for measurement-based quantum computation
play an important role in quantum information processing. Verifying the correctness of graph …

Efficient verification of ground states of frustration-free Hamiltonians

H Zhu, Y Li, T Chen - Quantum, 2024 - quantum-journal.org
Ground states of local Hamiltonians are of key interest in many-body physics and also in
quantum information processing. Efficient verification of these states are crucial to many …

Fidelity-estimation method for graph states with depolarizing noise

T Tanizawa, Y Takeuchi, S Yamashika, R Yoshii… - Physical Review …, 2023 - APS
Graph states are entangled states that are useful for several quantum information
processing tasks, such as measurement-based quantum computation and quantum …

Measurement-device-independent detection of beyond-quantum state

B Yu, M Hayashi - New Journal of Physics, 2024 - iopscience.iop.org
In quantum theory, a quantum state on a composite system of two parties realizes a non-
negative probability with any measurement element with a tensor product form. However …