Learning unknown pure quantum states

SM Lee, J Lee, J Bang - Physical Review A, 2018 - APS
We propose a learning method for estimating unknown pure quantum states. The basic idea
of our method is to learn a unitary operation U ̂ that transforms a given unknown state| ψ τ〉 …

Efficient quantum state analysis and entanglement detection

LM Knips - 2019 - edoc.ub.uni-muenchen.de
Entanglement is one of the most fascinating features of quantum theory, as it fundamentally
distinguishes quantum systems from classical systems. It not only might play a role in natural …

Compressed Sensing Quantum State Tomography Assisted by Adaptive Design

Q Yin, GY Xiang, CF Li, GC Guo - Chinese Physics Letters, 2018 - iopscience.iop.org
The recently proposed compressed sensing (CS) method sheds light on quantum state
tomography of multi-qubit systems with low rank, which greatly reduces the complexity of …

Adaptive tomography of qubits: purity versus statistical fluctuations

A Zhang, Y Zhang, F Xu, L Li… - Journal of Physics A …, 2018 - iopscience.iop.org
The success of quantum information processing applications relies on accurate and efficient
characterization of quantum states, especially nearly-pure states. In this work, we investigate …

Online evolution reconstruction from a single measurement record with random time intervals for quantum communication

H Zhou, Y Su, R Wang, Y Zhu, H Shen, T Pu… - Quantum Information …, 2017 - Springer
Online reconstruction of a time-variant quantum state from the encoding/decoding results of
quantum communication is addressed by developing a method of evolution reconstruction …

Optimizing the post-processing of online evolution reconstruction in quantum communication

H Zhou, G Li, W Zhu, Y Su, T Pu, Z Xu, J Wang… - Quantum Information …, 2020 - Springer
A method of optimizing the post-processing of online evolution reconstruction in quantum
communication is proposed and demonstrated for the six-state protocol. The aim of …