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Dynamics of Quantum Fisher information in a spin-boson model
Xiang Hao, Ninghua Tong, Shiqun Zhu
Quantum Fisher information characterizes the phase sensitivity of qubits in the spin-boson model with a finite bandwidth spectrum. In contrast with Markovian reservoirs, the quantu…
-point Virasoro Algebras and Their Modules of Densities
Ben Cox, Xiangqian Guo, Rencai Lu +1
In this paper we introduce and study -point Virasoro algebras, $\tilde{\W_a}$, which are natural generalizations of the classical Virasoro algebra and have as quotients multipoi…
PS-TRUST: Provably Secure Solution for Truthful Double Spectrum Auctions
Zhili Chen, Liusheng Huang, Lu Li +4
Truthful spectrum auctions have been extensively studied in recent years. Truthfulness makes bidders bid their true valuations, simplifying greatly the analysis of auctions. Howeve…
Nonnegative Tensor Factorization, Completely Positive Tensors and an Hierarchical Elimination Algorithm
Liqun Qi, Changqing Xu, Yi Xu
Nonnegative tensor factorization has applications in statistics, computer vision, exploratory multiway data analysis and blind source separation. A symmetric nonnegative tensor, wh…