# Quantum Information Processing

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*XY*model and the extended Ising model. We find that...

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*n*pure states of a quantum state $$\rho $$ ρ . Furthermore, we present triangle-like inequality for the...

Quantum Information Processing > 2019 > 18 > 1 > 1-11

*N*-particle GHZ states are used as quantum resources for multiparty quantum secure direct communication. Three new multiparty quantum secure direct communication protocols are proposed, which are based on the ideal quantum channels, the collective–dephasing noise channels and the collective–rotation noise channels, respectively. With the help of logical quantum states, the latter...

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