Using quantum state protection via dissipation in a quantum-dot molecule to solve the Deutsch problem

TL;DR

This paper demonstrates how to use dissipation in a quantum-dot molecule to protect quantum states and apply this method to solve the Deutsch problem, highlighting potential for solid-state quantum computation.

Contribution

It introduces a novel approach combining laser control and spontaneous emission to protect superposition states in quantum dots for quantum computing applications.

Findings

Protected superposition states in quantum dots using dissipation.

Successfully applied protected states to solve the Deutsch problem.

Shows potential for scalable solid-state quantum computation.

Abstract

The wide set of control parameters and reduced size scale make semiconductor quantum dots attractive candidates to implement solid-state quantum computation. Considering an asymmetric double quantum dot coupled by tunneling, we combine the action of a laser field and the spontaneous emission of the excitonic state to protect an arbitrary superposition state of the indirect exciton and ground state. As a by-product we show how to use the protected state to solve the Deutsch problem.