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20062014
most citedLoschmidt Echo and Berry phase of the quantum system coupled to the XY spin chain: Proximity to quantum phase transition

92 citations · 169 across the 5 of their papers we have counts for

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Showing 2014Show all

2 papers · 1 filter

cond-mat.str-el2014

Critical behavior of the energy gap and its relation with the Berry phase close to the excited state quantum phase transition in the Lipkin model

Zi-Gang Yuan, Ping Zhang, Shu-Shen Li

In our previous work [Phys. Rev. A \textbf{85}, 044102 (2012)], we have studied the Berry phase of the ground state and exited states in the Lipkin model. In this paper, using Hell…

quant-ph2014

Decoherence of a quantum system coupled to an XY spin chain: Role of the initial state of the spin chain

Zi-Gang Yuan, Ping Zhang, Shu-Shen Li

We study the decoherence of a coupled quantum system consisting of a central spin and its correlated environment described by a general spin-chain model. We make it clear that…