Microscopic environmental coupling in the graphene nanotorus qubit

Characterize the environmental coupling mechanisms governing the graphene nanotorus qubit, including electron–phonon processes, hot-electron relaxation, and decoherence, in order to establish a physically grounded open-system description of the platform.

Background

The paper studies quantum Mpemba dynamics using an effective two-level system formed by curvature-induced bound states in a graphene nanotorus. Although the Hamiltonian and electric-field control protocol are specified, the dissipative dynamics is modeled using phenomenological thermal rates. The authors note that the underlying nanotorus proposal had already identified several environmental processes as unresolved platform-level issues.

A microscopic treatment of these processes would be needed to determine device-specific relaxation and decoherence rates, rather than treating the relaxation scale as a phenomenological benchmark. The unresolved ingredients include coupling to phonons, hot-electron relaxation, and environmental decoherence.