288 citations · 530 across the 18 of their papers we have counts for
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Optimal Broadcasting of Mixed States
Gui-Fang Dang, Heng Fan
The N to M (M>N) universal quantum broadcasting of mixed states are proposed for qubits system. The broadcasting of mixed states is universal and optimal in the sense that the shri…
Vanishing environment-induced decoherence
Yong-Cheng Ou, Heng Fan
For a central system uniformly coupled to a XY spin-1/2 bath in a transverse field, we explicitly calculate the Loschmidt echo(LE) to characterize decoherence quantitatively. We fi…
Boundary effects to the entanglement entropy and two-site entanglement of the spin-1 valence-bond solid
Heng Fan, Vladimir Korepin, Vwani Roychowdhury +2
We investigate the von Neumann entropy of a block of subsystem for the valence-bond solid (VBS) state with general open boundary conditions. We show that the effect of the boundary…
Quantum cloning of identical mixed qubits
H. Fan, B. Y. Liu, K. J. Shi
Quantum cloning of two identical mixed qubits is studied. We propose the quantum cloning transformations not only for the triplet (symmetric) states but also for the s…