Reservoir-assisted energy migration through multiple spin-domains

TL;DR

This paper introduces a novel method for energy transfer in quantum networks using reservoirs interacting with spin pairs, enabling faster and more controlled energy migration than traditional channel-based methods.

Contribution

It presents a new reservoir-assisted energy migration mechanism through multiple spin domains, demonstrating faster transfer and potential for tailored quantum systems.

Findings

Energy can be transferred to a target node via reservoirs at zero temperature.

Migration occurs on faster timescales than single-spin damping rates.

The approach allows for system and environment tailoring to enhance quantum technologies.

Abstract

The transfer of energy through a network of nodes is fundamental to both how nature and current technology operates. Traditionally we think of the nodes in a network being coupled to channels that connect them and then energy is passed from node to channel to node until it reaches its targeted site. Here we introduce an alternate approach to this where our channels are replaced by collective environments (or actually reservoirs) which interact with pairs of nodes. We show how energy initially located at a specific node can arrive at a target node - even though that environment may be at zero temperate. Further we show that such a migration occurs on much faster time scales than the damping rate associated with a single spin coupled to the reservoir. Our approach shows the power of being able to tailor both the system & environment and the symmetries associated with them to provide new directions for future quantum technologies.