A5005435046- Quantum Mechanics and Applications
- Quantum Information and Cryptography
- Statistical Mechanics and Entropy
- Quantum many-body systems
- Advanced Mathematical Theories and Applications
- Spectroscopy and Quantum Chemical Studies
- Neural Networks and Applications
- Quantum optics and atomic interactions
- Sensor Technology and Measurement Systems
Peking University
2022-2025
We provide a graphical method to describe and analyze non-Gaussian quantum states using hypergraph framework. These are pivotal resources for computing, communication, metrology, but their characterization is hindered by complex high-order correlations. The formalism encapsulates transformation rules any Gaussian unitary operation local quadrature measurement, offering visually intuitive tool manipulating such through experimentally feasible pathways. Notably, we develop methods the...
Multipartite entanglement is an essential resource for quantum information tasks, but characterizing structures in continuous variable systems remains challenging, especially multimode non-Gaussian scenarios. In this work, we introduce a method detecting multipartite states. By leveraging the Fisher information, propose systematic approach to identify feasible operators that capture correlations We demonstrate effectiveness of our on over $10^5$ randomly generated multimode-entangled states,...
Abstract Spin systems interacting with boson environments are ubiquitous in nature. To what extent quantum states such depart from classicality is becoming an increasingly important issue. Here, we study nonclassicality involving the interaction between a spin and mode. We introduce simple effective method for quantifying spin–boson terms of entropy excess classical Tsallis entropy. The can be naturally extended to more general systems. Fundamental properties quantifier revealed, which...