# Controlling speedup in open quantum systems through the manipulating of system-reservoir bound states

## TL;DR

This paper presents a method to accelerate quantum system evolution by manipulating bound states between a qubit and its reservoir, using additional qubits to enhance speed across different spectral densities.

## Contribution

It introduces a novel mechanism for controlling quantum speedup through bound state manipulation with auxiliary qubits, applicable to various spectral densities.

## Key findings

- Stronger bound states lead to faster quantum evolution.
- Manipulating bound states effectively controls quantum speedup.
- The mechanism works for Lorentzian and Ohmic spectral densities.

## Abstract

In this paper, we give a mechanism for controlling speedup of a single-qubit open quantum system by exclusively manipulating the system-reservoir bound states using additional non-interacting qubits. It is demonstrated that providing stronger bound states in the system-reservoir spectrum makes the single-qubit evolution with higher speed. We examine the performance of the mechanism for different spectral densities such as Lorentzian and Ohmic and find out the decisive role of bound states manipulation in speeding up of quantum evolution.