Reservoir engineered hybrid quantum systems

Recent developments in quantum engineering have given us the capability to design hybrid systems [1] with novel properties unseen in the regime they normally operate in. It is possible to couple multiple distinct systems to the same environment opening the possibility for non-equilibrium quantum dynamics to be exhibited. One such example arises when two individual spin ensembles (the first excited) are collectively coupled to the same reservoir. Superradiance emission [2] from the first ensemble followed by super absorption in the second leads to counter intuitive behavior where the second ensemble becomes excited (charged) and unable to decay to [3]. Such effects enables both quantum energy storage (quantum batteries) and transport. In this talk we will explore quantum energy and correlation transport through a network of ensembles collectively coupled to environments. Energy present at a specific node can migrate to a target node on much faster timescales than the single spin damping rate. Our approach will highlight the importance of being able to design and tailor the properties and symmetries of hybrid quantum systems and illustrate new future quantum technology directions.

[1] Z.-L. Xiang, S. Ashhab, J. Q. You, and F. Nori, Rev. Mod. Phys. 85, 623 (2013).

[2] R. H. Dicke, Phys. Rev. 93, 99 (1954).

[3] Y. Hama, W. J. Munro, and Kae Nemoto, Phys. Rev. Lett. 120, 060403 (2018)