Optimal spin-state transition in singly occupied quantum dots network

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[1] Yaghouti, M.
[2] Sharifi, M.J.
[3] Kazemi, A.
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Yaghouti, M. | 1600年 / American Institute of Physics Inc.卷 / 113期
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We present a general model to study the spin-state transition in a network of singly occupied lateral quantum dots. The perturbative expansion of the extended Hubbard model is used to describe the dynamics of confined electrons as an effective spin Hamiltonian in the strong correlation regime. To optimize the transition; we apply the gradient ascent pulse engineering algorithm to control the exchange couplings constrained to the manifolds evaluated by Heitler-London approximation. The method is applicable to an arbitrary number of quantum dots in any arrangement. Results of the method applied to the case of triple quantum dot are presented for linear and triangular topologies. © 2013 American Institute of Physics;
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