Adiabatic quantum state transfer in non-uniform triple-quantum-dot system

TL;DR

This paper presents an adiabatic quantum state transfer method in a non-uniform triple-quantum-dot system, demonstrating high fidelity transfer with tolerance to coupling mismatches through numerical analysis.

Contribution

It introduces a novel adiabatic transfer scheme in a non-uniform quantum-dot system and analyzes its robustness against coupling mismatches.

Findings

High-fidelity transfer achievable with appropriate voltage and coupling ratios

Transfer fidelity depends on the ratio of peak voltage to maximum coupling

System shows large tolerance to coupling mismatch for high fidelity

Abstract

We introduce an adiabatic quantum state transfer scheme in a non-uniform coupled triple-quantum-dot system. By adiabatically varying the external gate voltage applied on the sender and receiver, the electron can be transferred between them with high fidelity. By numerically solving the master equation for a system with always-on interaction, it is indicated that the transfer fidelity depends on the ration between the peak voltage and the maximum coupling constants. The effect of coupling mismatch on the transfer fidelity is also investigated and it is shown that there is a relatively large tolerance range to permit high fidelity quantum state transfer.