9 papers
Quantum steering in networks: Measurement-device-independent detection, continuous variables, and practical Gaussian schemes
Shao-Hua Hu, Chung-Yun Hsieh, Huan-Yu Ku +2
We consider quantum steering certification in multipartite networks, with a focus on minimal trust scenarios: all-except-one parties are untrusted and treated device-independently.…
Monitoring Beam Splitter Entanglement using Quantumness
Hua-Li Chen, Hsien-Yi Hsieh, Chien-Ming Wu +2
We report on an experiment in which two independent squeezed vacuum states get entangled by mixing them with a balanced beam splitter. We follow standard practice and use an insepa…
Wigner's Phase Space Current for Variable Beam Splitters -- Phase Space Rotations and Newtonian Trajectories
Ole Steuernagel, Hsien-Yi Hsieh, Hua-Li Chen +1
Beam splitters allow us to superpose two continuous single mode quantum systems. To study the behaviour of beam splitters' strongly mode mixing dynamics we consider variable beam s…
Towards a Faithful Quantumness Certification Functional for One-Dimensional Continuous-Variable Systems
Ole Steuernagel, Ray-Kuang Lee
If the phase space-based Glauber-Sudarshan distribution, , has negative values the quantum state,~, it describes is nonclassical. Due to 's singular behaviour this sim…
A Sensitive Quantumness Measure for One-Dimensional Continuous-Variable Systems
Ole Steuernagel, Hsien-Yi Hsieh, Yi-Ru Chen +1
For one-dimensional continuous-variable quantum systems such as single-mode quantum optical systems, we give a quantification of the quantumness of such a system's state, Ï, by in…
Machine Learning for Quantum State Tomography: Robust Covariance Matrix Estimation for Squeezed Vacuum States with Thermal Noise
Juan Camilo Rodrıguez, Hsien-Yi Hsieh, Hua-Li Chen +3
We present a supervised machine learning-based method using convolutional neural networks to estimate the covariance matrix of Gaussian quantum states in the presence of thermal no…