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quant-ph2026
Quantum Channel-Induced Geometry of the Uhlmann Phase in Qubit Systems
F. Nieto-Guadarrama, F. Rojas, J. Villavicencio +1
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) cyc…
quant-ph2024
Entangling power of symmetric multiqubit systems: a geometrical approach
Eduardo Serrano-Ensástiga, Diego Morachis Galindo, Jesús A. Maytorena +1
Unitary gates with high entangling capabilities are relevant for several quantum-enhanced technologies. For symmetric multiqubit systems, such as spin states or bosonic systems, th…