Long-range adiabatic quantum state transfer through a tight-binding chain as a quantum data bus

TL;DR

This paper proposes an adiabatic passage scheme for long-range quantum state transfer through a tight-binding chain with always-on interactions, enabling coherent electron transport via external gate voltage modulation.

Contribution

It introduces a novel adiabatic protocol for quantum state transfer in tight-binding chains, analyzing its efficiency and parameter dependence for potential experimental realization.

Findings

The scheme achieves efficient coherent population transfer.

Energy gap and transfer time depend on system parameters.

Numerical simulations validate the protocol's effectiveness.

Abstract

We introduce a scheme based on adiabatic passage that allows for long-range quantum communication through tight-binding chain with always-on interaction. By adiabatically varying the external gate voltage applied on the system, the electron can be transported from the sender's dot to the aim one.We numerically solve the Schr\"odinger equation for a system with a given number of quantum dots. It is shown that this scheme is a simple and efficient protocol to coherently manipulate the population transfer under suitable gate pulses. The dependence of the energy gap and the transfer time on system parameters is analyzed and shown numerically. Our method provides a guidance for future realization of adiabatic quantum state transfer in experiments.