Abstract
We introduce an adiabatic quantum state transfer scheme in a nonuniform coupled triple-quantum-dot system. By adiabatically varying the external gate voltage applied on the system, the electron can be transferred between two spatially separated dots. We numerically study the effect of the system parameters on transfer fidelity and find a perfect matching between them. We also find that there is a relatively large tolerance range of difference between two coupling constants to permit high-fidelity quantum state transfer.
Highlights
The coherent control of transitions between individual discrete quantum states is central to the study of quantum state transfer (QST) [1, 2]
We introduce a non-uniform coupled TQD F array which can be manipulated by external gate voltage leads) TQD array |L, σ, |M, σ, |R, σ (σ =↑, ↓), where |κ, σ (κ = L, M, R) corresponds to an electron in the dot κ with spin σ
The fidelity of QST achieve 0.995 and only 0.5% of population remains in states |L and |M
Summary
The coherent control of transitions between individual discrete quantum states is central to the study of quantum state transfer (QST) [1, 2]. We use ground state |ψ0(t) of Eq (3) to induce population transfer from state |L to |R (see Fig. 1(b)).
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