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quant-ph2008★ 44 cited
Fidelity, fidelity susceptibility and von Neumann entropy to characterize the phase diagram of an extended Harper model
Longyan Gong, Peiqing Tong
For an extended Harper model, the fidelity for two lowest band edge states corresponding to different model parameters, the fidelity susceptibility and the von Neumann entropy of t…
quant-ph2007★ 29 cited
Von Neumann entropy and localization-delocalization transition of electron states in quantum small-world networks
Longyan Gong, Peiqing Tong
The von Neumann entropy for an electron in periodic, disorder and quasiperiodic quantum small-world networks(QSWNs) are studied numerically. For the disorder QSWNs, the derivative…
quant-ph2007★ 16 cited
Mode entanglement of an electron in one-dimensional determined and random potentials
Longyan Gong, Peiqing Tong
By using the measure of concurrence, mode entanglement of an electron moving in four kinds of one-dimensional determined and random potentials is studied numerically. The extended…