101 citations · 369 across the 14 of their papers we have counts for
3 papers · 1 filter
Generalization of geometric phase to completely positive maps
Marie Ericsson, Erik Sjöqvist, Johan Brännlund +2
We generalize the notion of relative phase to completely positive maps with known unitary representation, based on interferometry. Parallel transport conditions that define the geo…
Mixed state geometric phases, entangled systems, and local unitary transformations
Marie Ericsson, Arun K. Pati, Erik Sjöqvist +2
The geometric phase for a pure quantal state undergoing an arbitrary evolution is a ``memory'' of the geometry of the path in the projective Hilbert space of the system. We find th…
CP^n, or, entanglement illustrated
I. Bengtsson, J. Braennlund, K. Zyczkowski
We show that many topological and geometrical properties of complex projective space can be understood just by looking at a suitably constructed picture. The idea is to view CP^n a…