400 citations · 2.5k across the 79 of their papers we have counts for
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quant-ph2004★ 319 cited
Kinematic approach to the mixed state geometric phase in nonunitary evolution
D. M. Tong, E. Sjöqvist, L. C. Kwek +1
A kinematic approach to the geometric phase for mixed quantal states in nonunitary evolution is proposed. This phase is manifestly gauge invariant and can be experimentally tested…
quant-ph2004★ 9 cited
Mixed state non-Abelian holonomy for subsystems
Mikael Nordling, Erik Sjöqvist
Non-Abelian holonomy in dynamical systems may arise in adiabatic transport of energetically degenerate sets of states. We examine such a holonomy structure for mixtures of energeti…
quant-ph2004★ 5 cited
Off-diagonal quantum holonomy along density operators
Stefan Filipp, Erik Sjöqvist
Uhlmann's concept of quantum holonomy for paths of density operators is generalised to the off-diagonal case providing insight into the geometry of state space when the Uhlmann hol…