Dissipation-Assisted Quantum Information Processing with Trapped Ions

TL;DR

This paper proposes a method for quantum information processing with trapped ions that uses dissipation and sympathetic cooling to maintain coherence despite realistic decoherence, enabling scalable quantum simulations.

Contribution

It introduces a dissipation-assisted scheme that leverages damped vibrational modes for coherent and dissipative quantum operations in ion traps, scalable to larger systems.

Findings

Overcomes trap heating with sympathetic cooling.

Enables control of coherent and dissipative interactions.

Scalable to larger ion registers for quantum simulations.

Abstract

We introduce a scheme to perform dissipation-assisted quantum information processing in ion traps considering realistic decoherence rates, for example, due to motional heating. By means of continuous sympathetic cooling, we overcome the trap heating, and show that the damped vibrational excitations can still be exploited to mediate coherent interactions as well as collective dissipative effects. We describe how to control their relative strength experimentally, allowing for protocols of coherent or dissipative generation of entanglement. This scheme can be scaled to larger ion registers for coherent or dissipative many-body quantum simulations.