J. Villavicencio

Quantum Channel-Induced Geometry of the Uhlmann Phase in Qubit Systems

We show that a cyclically controlled non-coherence-generating channel supplies a two-parameter family of closed Bloch trajectories, absent in the single-parameter (temperature) cycles of the thermal Uhlmann literature, whose associated Uhlmann phase develops a genuine vortex--antivortex structure on the channel-paramet...