# Transport properties in a Non-Hermitian triple-quantum-dot structure

## TL;DR

This paper investigates how $ ext{PT}$-symmetric complex potentials influence quantum transport in a non-Hermitian triple-quantum-dot system, revealing significant effects on resonance behaviors and antiresonances.

## Contribution

It introduces the impact of $ ext{PT}$-symmetric potentials on transport properties in a non-Hermitian quantum dot system, highlighting new antiresonance phenomena.

## Key findings

- $ ext{PT}$-symmetry alters resonance and antiresonance behaviors.
- Shift and emergence of antiresonances due to $ ext{PT}$ potentials.
- Transport properties depend on interdot and dot-lead couplings.

## Abstract

In this work, we study the effect of $\mathcal{PT}$-symmetric complex potentials on the transport properties of one non-Hermitian system, which is formed by the coupling between a triple-quantum-dot molecule and two semi-infinite leads. As a result, it is found that the $\mathcal{PT}$-symmetric imaginary potentials take pronounced effects on transport properties of such a system, including changes from antiresonance to resonance, shift of antiresonance, and occurrence of new antiresonance, which are determined by the interdot and dot-lead coupling manners. This study can be helpful in understanding the quantum transport behaviors modified by the $\cal PT$ symmetry in non-Hermitian discrete systems.