601 citations · 1.3k across the 34 of their papers we have counts for
5 papers · 2 filters
Robustness of the adiabatic quantum search
Johan Åberg, David Kult, Erik Sjöqvist
The robustness of the local adiabatic quantum search to decoherence in the instantaneous eigenbasis of the search Hamiltonian is examined. We demonstrate that the asymptotic time-c…
Searching for degeneracies of real Hamiltonians using homotopy classification of loops in SO()
Niklas Johansson, Erik Sjöqvist
Topological tests to detect degeneracies of Hamiltonians have been put forward in the past. Here, we address the applicability of a recently proposed test [Phys. Rev. Lett. {\bf 92…
Quantal interferometry with dissipative internal motion
Erik Sjöqvist
In presence of dissipation, quantal states may acquire complex-valued phase effects. We suggest a notion of dissipative interferometry that accommodates this complex-valued structu…
Kinematic approach to off-diagonal geometric phases of nondegenerate and degenerate mixed states
D. M. Tong, Erik Sjöqvist, Stefan Filipp +2
Off-diagonal geometric phases have been developed in order to provide information of the geometry of paths that connect noninterfering quantal states. We propose a kinematic approa…
Effect of intersubsystem coupling on the geometric phase in a bipartite system
X. X. Yi, Erik Sjöqvist
The influence of intersubsystem coupling on the cyclic adiabatic geometric phase in bipartite systems is investigated. We examine the geometric phase effects for two uniaxially cou…