Quantum Process Overlapping Tomography: Theory and Experiment
Process overlapping tomography reconstructs selected overlapping information about quantum processes and is demonstrated experimentally as a more targeted alternative to full …
yi-hu
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1 min read
A Fully Connected Polarization-Entangled Network via Integrated Spontaneous Four-Wave Mixing Engineering
Integrated spontaneous four-wave mixing is engineered to realize a fully connected polarization-entangled network, advancing compact photonic infrastructure for multiuser quantum …
pingyu-zhu
Efficient Quantum Estimation of Hamiltonian Spectra via Shallow Circuits
Shallow quantum circuits are used to estimate Hamiltonian spectral information, reducing circuit demands for an important primitive in quantum simulation and computational …
pingyu-zhu
Quantum Memory Assisted Entangled State Verification with Local Measurements
Collective measurements across stored copies can substantially reduce the cost of entangled-state verification. The work gives optimal two-copy strategies for graph states and a …
siyuan-chen
Detecting and Eliminating Quantum Noise of Quantum Measurements
In this work, we propose a two-stage procedure to systematically address quantum noise inherent in quantum measurements. The idea behind it is intuitive: we first detect and then …
shuanghong-tang
Retrieving Nonlinear Features from Noisy Quantum States
Accurately estimating high-order moments of quantum states is an elementary precondition for many crucial tasks in quantum computing, such as entanglement spectroscopy, entropy …
benchi-zhao
Quantifying the unextendibility of entanglement
The unextendibility or monogamy of entangled states is a key property of quantum entanglement. Unlike conventional ways of expressing entanglement monogamy via entanglement measure …
Cross-Platform Comparison of Arbitrary Quantum Processes
In this work, we present a protocol for comparing the performance of arbitrary quantum processes executed on spatially or temporally disparate quantum platforms using Local …
congcong-zheng
Fidelity Estimation of Entangled Measurements with Local States
We propose an efficient protocol to estimate the fidelity of an n-qubit entangled measurement device, requiring only qubit state preparations and classical data post-processing. It …
zanqiu-shen
Mitigating quantum errors via truncated Neumann series
Quantum gates and measurements on quantum hardware are inevitably subject to hardware imperfections that lead to quantum errors. Mitigating such unavoidable errors is crucial to …