601 citations · 1.3k across the 34 of their papers we have counts for
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quant-ph2006★ 11 cited
On geometric phases for quantum trajectories
Erik Sjöqvist
A sequence of completely positive maps can be decomposed into quantum trajectories. The geometric phase or holonomy of such a trajectory is delineated. For nonpure initial states,…
quant-ph2006★ 21 cited
Operational approach to the Uhlmann holonomy
Johan Aberg, David Kult, Erik Sjöqvist +1
We suggest a physical interpretation of the Uhlmann amplitude of a density operator. Given this interpretation we propose an operational approach to obtain the Uhlmann condition fo…
quant-ph2006★ 42 cited
Geometric phase in weak measurements
Erik Sjöqvist
Pancharatnam's geometric phase is associated with the phase of a complex-valued weak value arising in a certain type of weak measurement in pre- and post-selected quantum ensembles…