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quant-ph2014★ 2 cited
Renormalized quantum Fisher information manifestation of Berezinskii-Kosterlitz-Thouless phase transition for spin-1/2 XXZ chain
Qiang Zheng, Yao Yao, Xun-Wei Xu +1
Combining the ideas of quantum Fisher information and quantum renormalization group method, the Berezinskii-Kosterlitz-Thouless quantum phase transition of spin- 1/2 XXZ chain is i…
quant-ph2014
Optimal quantum parameter estimation of two interacting qubits under decoherence
Zheng Qiang, Yao Yao, Yong Li
We investigate the parameter estimation problem in a two-qubit system, in which each qubit is independently interacting with its Markovian environment. We study in detail the sensi…