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- University of Science and Technology of ChinaCN37 papers
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11 papers · 1 filter
Broadband mode conversion via gradient index metamaterials
HaiXiao Wang, YaDong Xu, Patrice Genevet +2
We propose a design for broadband waveguide mode conversion based on gradient index metamaterials (GIMs). Numerical simulations demonstrate that the zeroth order of transverse magn…
Conjugate metamaterials and the perfect lens
Yadong Xu, Yangyang Fu, Lin Xu +1
In this letter, we show how transformation optics makes it possible to design what we call conjugate metamaterials. We show that these materials can also serve as substrates for ma…
Quantum Parameter Estimation in the Unruh-DeWitt detector model
Xiang Hao, Yinzhong Wu
Relativistic effects on the precision of quantum metrology for particle detectors, such as two-level atoms are studied. The quantum Fisher information is used to estimate the phase…
Thermal Quantum Speed Limit for Classical-Driving Open Systems
Wenjiong Wu, Kai Yan, Xiang Hao
Quantum speed limit (QSL) time for open systems driven by classical fields is studied in the presence of thermal bosonic environments. The decoherence process is quantitatively des…
Expansion dynamics in a one-dimensional hard-core boson model with three-body interactions
Jie Ren, Yin-Zhong Wu, Xue-Fen Xu
Using the adaptive time-dependent density matrix renormalization group method, we numerically investigate the expansion dynamics of bosons in a one-dimensional hard-core boson mode…
Completely Positive Tensors and Multi-Hypergraphs
Changqing Xu, Ziyan Luo, Liqun Qi
Completely positive graphs have been employed to associate with completely positive matrices for characterizing the intrinsic zero patterns. As tensors have been widely recognized…