Dotieratome

Dotieratome is a hypothetical nanoscale quasiparticle proposed in the field of quantum dot networks. It is defined as a localized, self-sustaining excitation that can traverse an array of coupled quantum dots while retaining a discrete identity comparable to a particle.

The concept arises in models of two-dimensional lattices of quantum dots with tunable interdot tunneling and Coulomb interactions. A dotieratome comprises a central core excitation—often described as a multi-excitonic state—surrounded by a polarization cloud formed by neighboring dots, which stabilizes its localization. The state can be characterized by a set of quantum numbers corresponding to charge, spin, and orbital configuration.

Properties include a small effective mass and a tunable energy gap that can be adjusted via gate voltages. Coherence times depend on phonon coupling, and propagation is mediated by interdot hopping. Dotieratomes can exhibit soliton-like propagation and can be manipulated with optical or electrical pulses, offering potential routes for control within dot lattices.

Discovery and status: the concept was proposed in theoretical work in the early 2020s as a candidate explanation for robust signal transport in dot lattices. There has been no unambiguous experimental observation to date; current research uses lithographically defined dot arrays and ultrafast spectroscopy to search for signatures.

Potential applications: if realized, dotieratomes could enable scalable quantum information networks, nanoscale energy transfer, and programmable metamaterials. Research is ongoing, with discussions about stability and how to distinguish dotieratomes from other excitations such as excitons and polaritons.