Erik Sjöqvist
Professor at Department of Physics and Astronomy; Materials Theory
- Mobile phone:
- +46 73 024 58 22
- E-mail:
- erik.sjoqvist@physics.uu.se
- Visiting address:
- Lägerhyddsvägen 5
SE-75237 Uppsala
Sweden - Postal address:
- Box 524
751 20 UPPSALA
Professor at Department of Physics and Astronomy; Materials Theory; Quantum Matter Theory
- Mobile phone:
- +46 73 024 58 22
- E-mail:
- erik.sjoqvist@physics.uu.se
- Visiting address:
- Lägerhyddsvägen 5
SE-75237 Uppsala
Sweden - Postal address:
- Box 524
751 20 UPPSALA
- CV:
- Download CV
Keywords
- quantum information
- quantum mechanics
- geometric phase
Biography
Erik Sjöqvist is a professor in quantum information theory at Uppsala University since 2005. He received his D.Phil at Uppsala University in 1995 and has been post-doc at University of Durham (UK), Oxford University (UK), and the Atomic Institute in Vienna during 1996-1999. He has been assistant professor 2000-2004 and received his docent degree in 2001. He has been Visiting Research Professor at Centre for Quantum Technologies at NUS, Singapore 2010-2013.
Research
Geometry and topology in quantum mechanics.
Key publications:
E. Sjöqvist et al., Geometric phase for mixed states in interferometry, Phys. Rev. Lett. 85, 2845 (2000). https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.85.2845
N. Johansson and E. Sjöqvist, Optimal topological test for degeneracies of real Hamiltonians, Phys. Rev. Lett. 92, 060406 (2004). https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.92.060406
E. Sjöqvist et al., Non-adiabatic holonomic quantum computation, New J. Phys. 14, 103035 (2012). https://iopscience.iop.org/article/10.1088/1367-2630/14/10/103035/meta
M. Johansson et al., Topological phases and multiqubit entanglement, Phys. Rev. A 85, 032112 (2012). https://journals.aps.org/pra/abstract/10.1103/PhysRevA.85.032112
E. Sjöqvist, Geometry along evolution of mixed quantum states, Phys. Rev. Research 2, 013344 (2020). https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.2.013344
Publications on arXiv:
Citations:

Publications
Recent publications
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Magnon shake-up: entanglement generation and sensing
Part of npj Computational Materials, 2026
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Separation of quantum time evolution into holonomic and dynamical parts
Part of Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2026
- DOI for Separation of quantum time evolution into holonomic and dynamical parts
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Sum rule for non-adiabatic geometric phases
Part of Physics Letters A, 2026
- DOI for Sum rule for non-adiabatic geometric phases
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Part of Physical Review Letters, 2026
- DOI for Comment on "Evolution Operator Can Always Be Separated into the Product of Holonomy and Dynamic Operators"
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Inequivalence of Landau-Lifshitz and Landau-Lifshitz-Gilbert dynamics for a single quantum spin
Part of Physical Review B, 2026
- DOI for Inequivalence of Landau-Lifshitz and Landau-Lifshitz-Gilbert dynamics for a single quantum spin
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All publications
Articles in journal
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Magnon shake-up: entanglement generation and sensing
Part of npj Computational Materials, 2026
- DOI for Magnon shake-up: entanglement generation and sensing
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-
Separation of quantum time evolution into holonomic and dynamical parts
Part of Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2026
- DOI for Separation of quantum time evolution into holonomic and dynamical parts
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Sum rule for non-adiabatic geometric phases
Part of Physics Letters A, 2026
- DOI for Sum rule for non-adiabatic geometric phases
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Part of Physical Review Letters, 2026
- DOI for Comment on "Evolution Operator Can Always Be Separated into the Product of Holonomy and Dynamic Operators"
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Inequivalence of Landau-Lifshitz and Landau-Lifshitz-Gilbert dynamics for a single quantum spin
Part of Physical Review B, 2026
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Spin-lattice couplings in 3d ferromagnets: Analysis from first principles
Part of Physical Review Materials, 2025
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iSWAP-type geometric gates induced by paths on Schmidt sphere
Part of Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2024
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Quantum Analog of Landau-Lifshitz-Gilbert Dynamics
Part of Physical Review Letters, 2024
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Chemical disorder effects on Gilbert damping of FeCo alloys
Part of Physical Review B, 2024
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Coupled spin-lattice dynamics from the tight-binding electronic structure
Part of Physical Review B, 2024
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Quantum spin systems: Toroidal classification and geometric duality
Part of Physical Review B, 2024
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iSWAP-type geometric gates induced by paths on the Schmidt sphere
Part of Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2024
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Coupled atomistic spin-lattice simulations of ultrafast demagnetization in 3d ferromagnets
Part of Scientific Reports, 2024
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Genuinely noncyclic geometric gates in two-pulse schemes
Part of Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2023
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Transmon probe for quantum characteristics of magnons in antiferromagnets
Part of Physical Review B, 2023
- DOI for Transmon probe for quantum characteristics of magnons in antiferromagnets
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Metaheuristic conditional neural network for harvesting skyrmionic metastable states
Part of Physical Review Research, 2023
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Genetic-tunneling driven energy optimizer for spin systems
Part of Communications Physics, 2023
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Tunable phonon-driven magnon-magnon entanglement at room temperature
Part of New Journal of Physics, 2023
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Influence of nonlocal damping on magnon properties of ferromagnets
Part of Physical Review B, 2023
- DOI for Influence of nonlocal damping on magnon properties of ferromagnets
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Part of Physical Review B, 2022
- DOI for Adiabatic spin dynamics and effective exchange interactions from constrained tight-binding electronic structure theory: Beyond the Heisenberg regime
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Part of European Physical Journal D, 2022
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Universal quantum computation and quantum error correction using discrete holonomies
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2022
- DOI for Universal quantum computation and quantum error correction using discrete holonomies
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Transitionless quantum driving in spin echo
Part of Physical Review Applied, 2022
- DOI for Transitionless quantum driving in spin echo
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Time-optimal holonomic quantum computation
Part of Physical review A : covering atomic, molecular, and optical physics and quantum information, 2022
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Dark path holonomic qudit computation
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2022
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Entanglement duality in spin-spin interactions
Part of Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2022
- DOI for Entanglement duality in spin-spin interactions
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Heat-conserving three-temperature model for ultrafast demagnetization in nickel
Part of Physical Review B, 2022
- DOI for Heat-conserving three-temperature model for ultrafast demagnetization in nickel
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Realizing nonadiabatic holonomic quantum computation beyond the three-level setting
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2021
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Connection between magnetic interactions and the spin-wave gap of the insulating phase of NaOsO3
Part of Physical Review B, 2021
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Part of Physical Review B, 2021
- DOI for Heisenberg and anisotropic exchange interactions in magnetic materials with correlated electronic structure and significant spin-orbit coupling
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Exchange constants for local spin Hamiltonians from tight-binding models
Part of Physical Review B, 2021
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High-order finite difference method for the Schrödinger equation on deforming domains
Part of Journal of Computational Physics, 2021
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Magnon-magnon entanglement and its quantification via a microwave cavity
Part of Physical Review B, 2021
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Majority gate for two-dimensional ferromagnets lacking inversion symmetry
Part of Physical Review Research, 2021
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Parallelity of mixed quantum ensembles
Part of arXiv, 2020
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Monopole Field Textures in Interacting Spin Systems
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2020
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Geometry along Evolution of Mixed Quantum States
Part of Physical Review Research, 2020
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Hierarchy of magnon mode entanglement in antiferromagnets
Part of Physical Review B Condensed Matter, 2020
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Equation of motion and the constraining field in ab initio spin dynamics
Part of Physical Review B, 2020
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Environment-assisted holonomic quantum maps
Part of Physical Review Letters, 2019
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Entangling power of holonomic gates in atom-based systems
Part of Journal of Physics A, 2018
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Path-shortening realizations of nonadiabatic holonomic gates
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2018
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The role of quantum coherence in dimer and trimer excitation energy transfer
Part of New Journal of Physics, 2017
- DOI for The role of quantum coherence in dimer and trimer excitation energy transfer
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Robust paths to realize nonadiabatic holonomic gates
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2017
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Rydberg-atom-based scheme of nonadiabatic geometric quantum computation
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2017
- DOI for Rydberg-atom-based scheme of nonadiabatic geometric quantum computation
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Proposed neutron interferometry test of Berry's phase for a circulating planar spin
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2017
- DOI for Proposed neutron interferometry test of Berry's phase for a circulating planar spin
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Single-shot realization of nonadiabatic holonomic quantum gates in decoherence-free subspaces
Part of Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2017
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Composite nonadiabatic holonomic quantum computation
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2017
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Quantum nonlocality in the excitation energy transfer in the Fenna-Matthews-Olson complex
Part of International Journal of Quantum Chemistry, p. 1763-1771, 2016
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Conceptual aspects of geometric quantum computation
Part of Quantum Information Processing, p. 3995-4011, 2016
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Nonadiabatic holonomic single-qubit gates in off-resonant Λ systems
Part of Physics Letters A, p. 65-67, 2016
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Geometric phases for mixed states of the Kitaev chain
Part of Philosophical Transactions. Series A, 2016
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Single-loop multiple-pulse nonadiabatic holonomic quantum gates
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2016
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Spin-electric Berry phase shift in triangular molecular magnets
Part of Physical Review B. Condensed Matter and Materials Physics, 2016
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Fast non-Abelian geometric gates via transitionless quantum driving
Part of Scientific Reports, 2015
- DOI for Fast non-Abelian geometric gates via transitionless quantum driving
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Realization of a holonomic quantum computer in a chain of three-level systems
Part of Physics Letters A, p. 3050-3053, 2015
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Realization of adiabatic Aharonov–Bohm scattering with neutrons
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2015
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Universal Non-adiabatic Holonomic Gates in Quantum Dots and Single-Molecule Magnets
Part of New Journal of Physics, 2014
- DOI for Universal Non-adiabatic Holonomic Gates in Quantum Dots and Single-Molecule Magnets
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Quantum computation in noiseless subsystems with fast non-Abelian holonomies
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2014
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Classification scheme of pure multipartite states based on topological phases
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2014
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Non-Abelian geometric phases in a system of coupled quantum bits
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2014
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Comment on `Detecting non-Abelian geometric phases with three-level Λ systems'
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2013
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Non-Abelian off-diagonal geometric phases in nano-engineered four-qubit systems
Part of Europhysics letters, p. 60011, 2013
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Validity of the rotating-wave approximation in nonadiabatic holonomic quantum computation
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2013
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Unifying Geometric Entanglement and Geometric Phase in a Quantum Phase Transition
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2013
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Three-qubit topological phase on entangled photon pairs
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2013
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Non-Adiabatic Holonomic Quantum Computation
Part of New Journal of Physics, 2012
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Relative state measures of correlations in bipartite quantum systems
Part of Quantum information & computation, p. 119-137, 2012
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Topological phases and multiqubit entanglement
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2012
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Non-adiabatic holonomic quantum computation in decoherence-free subspaces
Part of Physical Review Letters, 2012
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Robustness of nonadiabatic holonomic gates
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2012
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Open system effects on slow light and electromagnetically induced transparency
Part of Journal of Physics B, p. 135501, 2011
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Global asymmetry of many-qubit correlations: A lattice-gauge-theory approach
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2011
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Non-Abelian quantum holonomy of hydrogen-like atoms
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2011
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Correlation-induced non-Abelian quantum holonomies
Part of Journal of Physics A, p. 145301, 2011
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Geometric local invariants and pure three-qubit states
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2011
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Spin-orbit-coupled Bose-Einstein condensate in a tilted optical lattice
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2010
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Hidden parameters in open-system evolution unveiled by geometric phase
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2010
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Berry phase and fidelity susceptibility of the three-qubit Lipkin–Meshkov–Glick ground state
Part of Journal of Physics A, p. 354026, 2010
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Entanglement-induced geometric phase of quantum states
Part of Physics Letters A, p. 1431-1433, 2010
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Experimentally testable geometric phase of sequences of Everett's relative quantum states
Part of Europhysics letters, p. 30005, 2009
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Jahn-Teller-induced Berry phase in spin-orbit-coupled Bose-Einstein condensates
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2009
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Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2008
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Nodal free geometric phases: concept and application to geometric quantum computation
Part of Physics Letters A, p. 596-599, 2008
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Non-Abelian generalization of off-diagonal geometric phases
Part of Europhysics letters, p. 60004, 2007
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Operational approach to the Uhlmann holonomy
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2007
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Weak cloning of an unknown quantum state
Part of Physics Letters A, p. 396-398, 2006
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Manifestations of quantum holonomy in interferometry
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2006
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Noncyclic geometric changes of quantum states
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2006
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Geometric phase in weak measurements
Part of Physics Letters A, p. 187-189, 2006
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Robustness of the adiabatic quantum search
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2005
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Mixed-state non-Abelian holonomy for subsystems
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2005
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Adiabatic approximation for weakly open systems
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2005
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Searching for degeneracies of real Hamiltonians using homotopy classification of loops in SO(n)
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2005
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Adiabatic geometric phases in hydrogenlike atoms
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2005
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Off-diagonal quantum holonomy along density operators
Part of Physics Letters A, p. 205-212, 2005
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Kinematic approach to off-diagonal geometric phases of nondegenerate and degenerate mixed states
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2005
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Quantum adiabatic search with decoherence in the instantaneous energy eigenbasis
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2005
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Kinematic approach to mixed state geometric phase in nonunitary evolution
Part of Physical Review Letters, 2004
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On the alleged nonlocal and topological nature of the molecular Aharonov-Bohm effect
Part of Advances in Quantum Chemistry, p. 239-252, 2004
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Effect of intersubsystem coupling on the geometric phase in a bipartite system
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2004
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Quantal interferometry with dissipative internal motion
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2004
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Comment on `Geometric phases for mixed states during cyclic evolutions'
Part of Journal of Physics A, p. 7393-7394, 2004
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Optimal topological test for degeneracies of real Hamiltonians
Part of Physical Review Letters, 2004
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Geometry of decomposition dependent evolutions of mixed states
Part of International Journal of Quantum Information, p. 247-256, 2004
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Off-diagonal generalization of the mixed-state geometric phase
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2003
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Measuring Pancharatnam's relative phase for SO(3) evolutions using spin polarimetry
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2003
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Precession and interference in the Aharonov-Casher and scalar Aharonov-Bohm effect
Part of Foundations of physics, p. 1085-1105, 2003
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Generalization of the geometric phase to completely positive maps
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2003
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Off-diagonal geometric phases for mixed states
Part of Physical Review Letters, 2003
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Mixed state geometric phases, entangled systems, and local unitary transformations
Part of Physical Review Letters, 2003
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Noncyclic geometric quantum computation
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2003
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Uhlmann's geometric phase in presence of isotropic decoherence
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2003
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Reply to Comment on `Locality and topology in the molecular Aharonov-Bohm effect'
Part of Physical Review Letters, 2003
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Noncyclic mixed state phase in SU(2) polarimetry
Part of Physics Letters A, p. 12-15, 2003
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Relation between geometric phases of entangled bi-partitesystems and their subsystems
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2003
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Reply to Comment on `Geometric phases for mixed states in interferometry'
Part of Physical Review Letters, p. 268902, 2002
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Quantum computation using the Aharonov-Casher set up
Part of Physics Letters A, p. 7-10, 2002
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Towards a quantum Hall effect for atoms using electric fields
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2002
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Comment on `Complementarity between Local and Nonlocal Topological Effects'
Part of Physical Review Letters, p. 198901, 2002
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Locality and topology in the molecular Aharonov-Bohm effect
Part of Physical Review Letters, p. 210401, 2002
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Proposed interferometry test of noncyclic geometric phase
Part of Physics Letters A, p. 4-6, 2001
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Quantal phase in split-beam interferometry
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2001
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Geometric phases for mixed states in interferometry
Part of Physical Review Letters, p. 2845-2849, 2000
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Quantal phase for nonmaximally entangled photons
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2000
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Geometric phase for entangled spin pairs
Part of Physical Review A. Atomic, Molecular, and Optical Physics, 2000
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Anandan–Aharonov–Casher oscillations in a simply connected region
Part of Physics Letters A, p. 10-13, 2000
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Degree of electron-nuclear entanglement in molecular states
Part of International Journal of Quantum Chemistry, p. 526-533, 2000
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Remarks on identical particles in de Broglie-Bohm theory
Part of Physics Letters A, p. 229-235, 1999
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Mobile flux line in an Aharonov-Bohm system
Part of Physical Review A. Atomic, Molecular, and Optical Physics, p. 1850-1853, 1999
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Quantal trajectories for adiabatic and nonadiabatic regimes of vibronic systems
Part of International Journal of Quantum Chemistry, p. 409-416, 1999
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Analysis of electron transport in a two-dimensional structure using quantal trajectories
Part of Journal of Physics, p. 5583-5594, 1998
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Extending the quantal adiabatic theorem: Geometry of noncyclic motion
Part of American Journal of Physics, p. 431-438, 1998
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Berry's phase in pilot-wave theory
Part of Foundations of physics letters, p. 179-188, 1998
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A quantum mechanical angle anholonomy
Part of Physics Letters A, p. 14-16, 1997
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Geometric phase, quantum measurements, and the de Broglie-Bohm model
Part of Physical Review A. Atomic, Molecular, and Optical Physics, p. 1638-1641, 1997
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Galilean noninvariance of geometric phase
Part of Physics Letters A, p. 273-278, 1997
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Part of Physical Review A. Atomic, Molecular, and Optical Physics, p. 3417-3424, 1997
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Fractional statistics in Bohm's theory
Part of Physics Letters A, p. 160-166, 1995
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The molecular Aharonov-Bohm effect for bound states beyond the adiabatic approximation
Part of Chemical Physics, p. 17-26, 1994
Articles, review/survey
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Geometric and holonomic quantum computation
Part of Physics reports, p. 1-53, 2023
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Geometric phases in quantum information
Part of International Journal of Quantum Chemistry, p. 1311-1326, 2015
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A new phase in quantum computation
Part of Physics, 2008
Books
Chapters in book
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Kvantdatorer - beräkningsmaskiner i landet annorlunda
Part of Annales Academiae Regiae Scientarium Upsaliensis, p. 69-75, Kungl. Vetenskapssamhällets i Uppsala, 2017
Conference papers
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On geometric phases for quantum trajectories
p. 195-201, 2006
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Off-diagonal mixed state phases in unitary evolution
Part of Foundations of probability and physics - 2, p. 545-555, 2003
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Part of Quantum Theory, p. 343, 2002
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Degree of electron-nuclear entanglement in the E x e Jahn-Teller system
Part of Proceedings of the XIV International Symposium on Electron-Phonon Dynamics and Jahn-Teller Effect, p. 20, 1999
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Geometric phase-shifts in pilot-wave theory
Part of Daniel M. Greenberger and Anton Zeilinger, p. 898-899, 1995