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quant-ph2008
Fidelity susceptibility for SU(2)-invariant states
Xiaoguang Wang, Shi-Jiang Gu
We study the fidelity susceptibility of two SU(2)-invariant reduced density matrices. Due to the commuting property of these matrices, analytical results for reduced fidelity susce…
quant-ph2008★ 45 cited
Operator fidelity susceptibility, decoherence and quantum criticality
Xiao-Ming Lu, Zhe Sun, Xiaoguang Wang +1
The extension of the notion of quantum fidelity from the state-space level to the operator one can be used to study environment-induced decoherence. state-dependent operator fideli…
quant-ph2005★ 42 cited
Comment on "Quantum secret sharing based on reusable Greenberger-Horne-Zeilinger states as secure carriers" [Phys. Rev. A 67, 044302 (2003)]
Fei Gao, Fenzhuo Guo, Qiaoyan Wen +1
In a recent paper [S. Bagherinezhad and V. Karimipour, Phys. Rev. A 67, 044302 (2003)], a quantum secret sharing protocol based on reusable GHZ states was proposed. However, in thi…