Xiao Yuan

Detecting multipartite entanglement structure with minimal resources

2019 · npj Quantum Information

Abstract Recently, there are tremendous developments on the number of controllable qubits in several quantum computing systems. For these implementations, it is crucial to determine the entanglement structure of the prepared multipartite quantum state as …

Quantum coherence via conditional entropy

2018 · Journal of Physics A Mathematical and Theoretical

Abstract Quantum coherence characterizes the non-classical feature of a single party system with respect to a local basis. Based on a recently introduced resource framework, coherence can be regarded as a resource and be systematically …

Quantum computation of molecular vibrations

2018 · arXiv (Cornell University)

Molecular vibrations underpin important phenomena such as spectral properties, energy transfer, and molecular bonding. However, obtaining a detailed understanding of the vibrational structure of even small molecules is computationally expensive. While numerous algorithms exist for …

Quantifying Coherence with Untrusted Devices

2018 · arXiv (Cornell University)

Device-independent (DI) tests allow to witness and quantify the quantum feature of a system, such as entanglement, without trusting the implementation devices. Although DI test is a powerful tool in many quantum information tasks, it …

Efficient detection of multipartite entanglement structure

2019 · arXiv (Cornell University)

Recently, there are tremendous developments on the number of controllable qubits in several quantum computing systems. For these implementations, it is crucial to determine the entanglement structure of the prepared multipartite quantum state as a …

Hybrid quantum-classical algorithms and quantum error mitigation

2021 · Oxford University Research Archive (ORA) (University of Oxford)

Quantum computers can exploit a Hilbert space whose dimension increases exponentially with the number of qubits. In experiment, quantum supremacy has recently been achieved by the Google team by using a noisy intermediate-scale quantum (NISQ) …

Resource-efficient quantum-classical hybrid algorithm for energy gap evaluation

2024 · Physical Review A

Estimating the eigenvalue or energy gap of a Hamiltonian $H$ is vital for studying quantum many-body systems. Particularly, many of the problems in quantum chemistry, condensed-matter physics, and nuclear physics investigate the energy gap between …

Robust Mølmer-Sørensen Gate Against Symmetric and Asymmetric Errors

2025 · arXiv (Cornell University)

To achieve the entangling gate fidelity above the quantum error correction threshold, it is critical to suppress errors due to experimental imperfection. We consider the Mølmer-Sørensen gates in trapped-ion systems, and develop a general approach …