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  • 1.
    Adell, J.
    et al.
    Department of Applied Physics, Chalmers University of Technology, Gothenburg, Sweden.
    Ulfat, I.
    Department of Applied Physics, Chalmers University of Technology, Gothenburg, Sweden / Department of Physics, University of Karachi, Karachi, Pakistan.
    Ilver, L.
    Department of Applied Physics, Chalmers University of Technology, Gothenburg, Sweden.
    Sadowski, J.
    Institute of Physics, Polish Academy of Sciences, Warsaw, Poland / MAX-lab, Lund University, Lund, Sweden.
    Karlsson, Krister
    University of Skövde, School of Life Sciences.
    Kanski, J.
    Department of Applied Physics, Chalmers University of Technology, Gothenburg, Sweden.
    Thermal diffusion of Mn through GaAs overlayers on (Ga, Mn)As2011In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 23, no 8, article id 085003Article in journal (Refereed)
    Abstract [en]

    Thermally stimulated diffusion of Mn through thin layers of GaAs has been studied by x-ray photoemission. (Ga, Mn)As samples with 5 at% Mn were capped with 4, 6 and 8 monolayer (ML) GaAs, and Mn diffusing through the GaAs was trapped on the surface by means of amorphous As. It was found that the out-diffusion is completely suppressed for an 8 ML thick GaAs film. The short diffusion length is attributed to an electrostatic barrier formed at the (Ga, Mn)As/GaAs interface.

  • 2.
    Alfredsson, Svante
    et al.
    University of Skövde, School of Technology and Society.
    Högberg, Jia Li
    University of Skövde, School of Technology and Society.
    A closed-form solution to statically indeterminate adhesive joint problems — exemplified on ELS-specimens2008In: International Journal of Adhesion and Adhesives, ISSN 0143-7496, E-ISSN 1879-0127, Vol. 28, no 7, p. 350-361Article in journal (Refereed)
    Abstract [en]

    A beam/adhesive-layer model is developed. For this model a closed-form solution method applicable to arbitrary boundary conditions is presented. This enables the solution of a large number of practical problems which may be statically indeterminate. The stress state in the adhesive layer and the adherends of the beam/adhesive-layer model is also scrutinized. The method is exemplified in an analysis of the end-loaded split (ELS) specimen, commonly used to determine fracture energies of adhesive layers. The effect of the flexibility of the adhesive layer on the energy release rate and the critical crack length for stable crack growth is examined. Both symmetric and unsymmetric ELS-specimens are studied.

  • 3.
    Aryasetiawan, F.
    et al.
    Department of Physics, Division of Mathematical Physics, Lund University, Lund, Sweden.
    Karlsson, Krister
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Miyake, T.
    CD-FMat, AIST, Tsukuba, Japan / ESICMM, National Institute for Materials Science, Tsukuba, Japan.
    Green's function theory of orbital magnetic moment of interacting electrons in solids2016In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 93, no 16, article id 161104(R)Article in journal (Refereed)
  • 4.
    Aryasetiawan, F.
    et al.
    Chiba University, Japan.
    Sakuma, R.
    Chiba University, Japan.
    Karlsson, Krister
    University of Skövde, School of Life Sciences.
    GW approximation with self-screening correction2012In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 85, no 3, p. 035106-Article in journal (Refereed)
    Abstract [en]

    The GW approximation takes into account electrostatic self-interaction contained in the Hartree potential through the exchange potential. However, it has been known for a long time that the approximation contains self-screening error, as is evident in the case of the hydrogen atom. When applied to the hydrogen atom, the GW approximation does not yield the exact result for the electron removal spectra because of the presence of self-screening: the hole left behind is erroneously screened by the only electron in the system that is no longer present. We present a scheme to take into account self-screening and show that the removal of self-screening is equivalent to including exchange diagrams, as far as self-screening is concerned. The scheme is tested on a model hydrogen dimer and it is shown that the scheme yields the exact result to second order in (Uο-Uι)/2t, where Uο andare, respectively, the on-site and off-site Hubbard interaction parameters and t is the hopping parameter.

  • 5.
    Aryasetiawan, Ferdi
    et al.
    Department of Physics, Division of Mathematical Physics, Lund University, Lund, Sweden.
    Karlsson, Krister
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Modern theory of orbital magnetic moment in solids2019In: Journal of Physics and Chemistry of Solids, ISSN 0022-3697, E-ISSN 1879-2553, Vol. 128, p. 87-108Article in journal (Refereed)
    Abstract [en]

    The magnetic moment in a solid is usually associated with the electron spins but there is an additional contribution due to the orbital motion of the electrons. For a finite system such as an atom or molecule the orbital moment can be readily calculated. However, for a periodic system the formula used for finite systems becomes ill-defined due to the presence of the position operator. In the last decade a modern theory of orbital magnetization that allows for a rigorous calculation of the magnetic moment of periodic crystals has been developed. This article provides a survey of the theoretical development of this new topic as well as recent, albeit a few, applications of the new formula to real materials. Although the original theory was worked out for non-interacting systems, there has been recent progress in the theory of orbital magnetic moment of interacting electrons in solids. To include the effects of electron-electron interactions two approaches have been proposed, one based on current spin density functional theory and another on the many-body Green's function method. The two approaches are very different but both methods provide convenient yet rigorous means of including the effects of exchange and correlations beyond the commonly used local density approximation of density functional theory.

  • 6.
    Di Marco, I.
    et al.
    Uppsala University, Sweden.
    Thunström, P.
    Uppsala University, Sweden / Institute for Solid State Physics, Vienna University of Technology, Austria.
    Katsnelson, M. I.
    Radboud University Nijmegen, The Netherlands.
    Sadowski, J.
    Polish Academy of Sciences, Poland / Lund University, Sweden.
    Karlsson, Krister
    University of Skövde, School of Life Sciences.
    Lebegue, S.
    Institut Jean Barriol, Université de Lorraine, France.
    Kanski, J.
    Chalmers University of Technology, Sweden.
    Eriksson, O.
    Uppsala University, Sweden.
    Electron correlations in MnxGa1-xAs as seen by resonant electron spectroscopy and dynamical mean field theory2013In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 4, article id 2645Article in journal (Refereed)
    Abstract [en]

    After two decades since the discovery of ferromagnetism in manganese-doped gallium arsenide, its origin is still debated, and many doubts are related to the electronic structure. Here we report an experimental and theoretical study of the valence electron spectrum of manganese-doped gallium arsenide. The experimental data are obtained through the differences between off- and on-resonance photo emission data. The theoretical spectrum is calculated by means of a combination of density-functional theory in the local density approximation and dynamical mean field theory, using exact diagonalization as impurity solver. Theory is found to accurately reproduce measured data and illustrates the importance of correlation effects. Our results demonstrate that the manganese states extend over a broad range of energy, including the top of the valence band, and that no impurity band splits-off from the valence band edge, whereas the induced holes seem located primarily around the manganese impurity.

  • 7.
    Högberg, J. Li
    et al.
    University of Skövde, School of Technology and Society.
    Sørensen, B. F.
    Tech Univ Denmark, Mat Res Dept, Riso Natl Lab, DK-4000 Roskilde, Denmark.
    Stigh, Ulf
    University of Skövde, School of Technology and Society.
    Constitutive behaviour of mixed mode loaded adhesive layer2007In: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 44, no 25-26, p. 8335-8354Article in journal (Refereed)
    Abstract [en]

    Mixed mode testing of adhesive layer is performed with the Mixed mode double Cantilever Beam specimen. During the experiments, the specimens are loaded by transversal and/or shear forces; seven different mode mixities are tested. The J-integral is used to evaluate the energy dissipation in the failure process zone. The constitutive behaviour of the adhesive layer is obtained by a so called inverse method and fitting an existing mixed mode cohesive model, which uses a coupled formulation to describe a mode dependent constitutive behaviour. The cohesive parameters are determined by optimizing the parameters of the cohesive model to the experimental data. A comparison is made with the results of two fitting procedures. It is concluded that the constitutive properties are coupled, i.e. the peel and shear stress depend on both the peel and shear deformations. Moreover, the experiments show that the critical deformation in the peel direction is virtually independent of the mode mixity.

  • 8.
    Högberg, Jia Li
    University of Skövde, School of Technology and Society.
    Unbalanced UCB-specimen2006In: CDCM06 online proceedings, University of Stuttgart , 2006Conference paper (Refereed)
    Abstract [en]

    The Double Cantilever Beam (DCB) specimen is a common test geometry for testing of mode I fracture properties of adhesive joints. However, when unbalances are introduced to the adherends, the adhesive layer is loaded in a combination of peel (mode I) and shear (mode II). In this work the unbalanced DCB-specimen is studied by the use of the beam/adhesive layer (B/A) model, in which the adherends are considered as beams and the adhesive layer as a generalised spring media. The effect of the thickness of adhesive layer together with the effect of the geometrical and material unbalances is analysed. The result of the B/A model is compared to the continuum model through FE-simulations. Finally, an unsymmetric DCB-specimen is dimensioned for mixed mode testing of adhesive layer.

  • 9.
    Kanski, J.
    et al.
    Department of Experimental Physics, Chalmers University of Technology, Göteborg, Sweden.
    Ulfat, I.
    Department of Experimental Physics, Chalmers University of Technology, Göteborg, Sweden.
    Ilver, L.
    Department of Experimental Physics, Chalmers University of Technology, Göteborg, Sweden.
    Leandersson, M.
    MAX-lab, Lund University, Lund, Sweden.
    Sadowski, J.
    MAX-lab, Lund University, Lund, Sweden.
    Karlsson, Krister
    University of Skövde, School of Life Sciences.
    Pal, P.
    National Physical Laboratory, New Delhi, India.
    Mn-induced modifications of Ga 3d photoemission from (Ga, Mn) As: evidence for long range effects2012In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 24, no 43, article id 435802Article in journal (Refereed)
    Abstract [en]

    Using synchrotron based photoemission, we have investigated the Mn-induced changes in Ga 3d core level spectra from as-grown Ga1-xMnxAs. Although Mn is located in Ga substitutional sites, and therefore does not have any Ga nearest neighbors, the impact of Mn on the Ga core level spectra is pronounced even at Mn concentrations in the region of 0.5%. The analysis shows that each Mn atom affects a volume corresponding to a sphere with around 1.4 nm diameter.

  • 10.
    Kanski, Janusz
    et al.
    Chalmers University of Technology, Göteborg, Sweden.
    Ilver, Lars
    Chalmers University of Technology, Göteborg, Sweden.
    Karlsson, Krister
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ulfat, Intikhab
    Department of Physics, University of Karachi, Pakistan.
    Leandersson, Mats
    MAX IV Laboratory, Lund University, Lund, Sweden.
    Sadowski, Janusz
    MAX-IV laboratory, Lund University, Lund, Sweden / Institute of Physics, Polish Academy of Sciences, Warszawa, Poland.
    Di Marco, Igor
    Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden.
    Electronic structure of (Ga,Mn)As revisited2017In: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 19, no 2, p. 1-8, article id 023006Article in journal (Refereed)
    Abstract [en]

    The detailed nature of electronic states mediating ferromagnetic coupling in dilute magnetic semiconductors, specifically (Ga,Mn)As, has been an issue of long debate. Two confronting models have been discussed emphasizing host band vs. impurity band carriers. Using angle resolved photoemission we show that the electronic structure of the (Ga,Mn)As system is significantly modified from that of GaAs throughout the valence band. Close to the Fermi energy, the presence of Mn induces a strong mixing of the bulk bands of GaAs, which results in the appearance of a highly dispersive band in the gap region of GaAs.

    For Mn concentrations above 1% the band reaches the Fermi level, and can thus host the delocalized holes needed for ferromagnetic coupling. Overall, our data provide a firm evidence of delocalized carriers belonging to the modified host valence band.

  • 11.
    Nilsson, Fredrik
    et al.
    Lund University.
    Karlsson, Krister
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Aryasetiawan, Ferdi
    Lund University.
    Dynamically screened Coulomb interaction in the parent compounds of hole-doped cuprates: Trends and exceptions2019In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 99, no 7, p. 1-9, article id 075135Article in journal (Refereed)
    Abstract [en]

    Although cuprate high-temperature superconductors were discovered already in 1986 the origin of the pairing mechanism remains elusive. While the doped compounds are superconducting with high transition temperatures T-c, the undoped compounds are insulating due to the strong effective Coulomb interaction between the Cu 3d holes. We investigate the dependence of the maximum superconducting transition temperature T-cmax on the on-site effective Coulomb interaction U using the constrained random-phase approximation. We focus on the commonly used one-band model of the cuprates, including only the antibonding combination of the Cu d(x2-y2) and O p(x) and p(y) orbitals and find a screening-dependent trend between the static value of U and T-cmax for the parent compounds of a large number of hole-doped cuprates. Our results suggest that superconductivity may be favored by a large on-site Coulomb repulsion. We analyze both the trend in the static value of U and its frequency dependence in detail and, by comparing our results to other works, speculate on the mechanisms behind the trend.

  • 12.
    Pylkkänen, Paavo
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. University of Helsinki, Finland.
    Henry Stapp Vs. David Bohm on Mind, Matter, and Quantum Mechanics2019In: Activitas Nervosa Superior: Journal for Neuroscience and Cognitive Research, ISSN 1802-9698, Vol. 61, no 1-2, p. 48-50Article in journal (Refereed)
    Abstract [en]

    This paper briefly discusses some of David Bohm’s views on mind and matter and suggests that they allow for a stronger possibility for conscious free will to influence quantum dynamics than Henry Stapp’s approach.

  • 13.
    Pylkkänen, Paavo
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. University of Helsinki, Finland.
    Quantum Theories of Consciousness2018In: The Routledge Handbook of Consciousness / [ed] Rocco J. Gennaro, Taylor & Francis, 2018, 1, p. 216-231Chapter in book (Refereed)
    Abstract [en]

    This chapter provides a brief historical introduction to quantum theory, and shows that the theory opens up some radically new ways of thinking about the place of mind and consciousness in nature. Quantum theory is all about learning, on the basis of scientific experiments, to question the "obvious" truths about the nature of the physical world and to come up with more coherent alternatives. The chapter considers the famous two-slit experiment. It explores what the different interpretations of quantum theory say about situations like the two-slit experiment, and also considers what kind of theories of mind and consciousness some interpretations have inspired. The attempt to explain mind and consciousness in terms of the quantum theory involves heavy speculation. The advances in quantum biology, while not giving direct support to quantum brain theory, perhaps make a biologically grounded quantum theory of consciousness seem less inconceivable.

  • 14.
    Pylkkänen, Paavo
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Department of Philosophy, History and Art Studies, University of Helsinki, Helsinki, Finland.
    Quantum Theory and the Place of Mind in the Causal Order of Things2019In: Quanta and Mind: Essays on the Connection between Quantum Mechanics and the Consciousness / [ed] J. Acacio de Barros, Carlos Montemayor, Springer, 2019, p. 163-171Chapter in book (Refereed)
    Abstract [en]

    The received view in physicalist philosophy of mind assumes that causation can only take place at the physical domain and that the physical domain is causally closed. It is often thought that this leaves no room for mental states qua mental to have a causal influence upon the physical domain, leading to epiphenomenalism and the problem of mental causation. However, in recent philosophy of causation there has been growing interest in a line of thought that can be called causal antifundamentalism: causal notions cannot play a role in physics, because the fundamental laws of physics are radically different from causal laws. Causal anti-fundamentalism seems to challenge the received view in physicalist philosophy of mind and thus raises the possibility of there being genuine mental causation after all. This paper argues that while causal anti-fundamentalism provides a possible route to mental causation, we have reasons to think that it is incorrect. Does this mean that we have to accept the received view and give up the hope of genuine mental causation? I will suggest that the ontological interpretation of quantum theory provides us both with a view about the nature of causality in fundamental physics, as well as a view how genuine mental causation can be compatible with our fundamental (quantum) physical ontology.

    The full text will be freely available from 2021-09-20 00:01
  • 15.
    Pylkkänen, Paavo
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Department of Philosophy, History, Culture and Art Studies & The Academy of Finland Center of Excellence in the Philosophy of the Social Sciences (TINT), University of Helsinki, Finland.
    The quantum epoché2015In: Progress in Biophysics and Molecular Biology, ISSN 0079-6107, E-ISSN 1873-1732, Vol. 119, no 3, p. 332-340Article in journal (Refereed)
    Abstract [en]

    The theme of phenomenology and quantum physics is here tackled by examining some basic interpretational issues in quantum physics. One key issue in quantum theory from the very beginning has been whether it is possible to provide a quantum ontology of particles in motion in the same way as in classical physics, or whether we are restricted to stay within a more limited view of quantum systems, in terms of complementary but mutually exclusive phenomena. In phenomenological terms we could describe the situation by saying that according to the usual interpretation of quantum theory (especially Niels Bohr's), quantum phenomena require a kind of epoche (i.e. a suspension of assumptions about reality at the quantum level). However, there are other interpretations (especially David Bohm's) that seem to re-establish the possibility of a mind-independent ontology at the quantum level. We will show that even such ontological interpretations contain novel, non-classical features, which require them to give a special role to phenomenaor appearances, a role not encountered in classical physics. We will conclude that while ontological interpretations of quantum theory are possible, quantum theory implies the need of a certain kind of epoche even for this type of interpretations. While different from the epoche connected to phenomenological description, the quantum epochenevertheless points to a potentially interesting parallel between phenomenology and quantum philosophy.

  • 16.
    Pylkkänen, Paavo
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Department of History, Philosophy, Culture and Art Studies & Academy of Finland Center of Excellence in the Philosophy of the Social Sciences, University of Helsinki, Helsinki, Finland.
    The role of Eastern approaches in David Bohm's scientific-philosophical odysseia2017In: Progress in Biophysics and Molecular Biology, ISSN 0079-6107, E-ISSN 1873-1732, Vol. 131, p. 171-178Article in journal (Refereed)
  • 17.
    Sjöstrand, Tor J.
    et al.
    Department of Physics, Division of Mathematical Physics, Lund University, Sweden.
    Karlsson, Krister
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Aryasetiawan, Ferdi
    Department of Physics, Division of Mathematical Physics, Lund University, Sweden.
    Influence of correlations on the orbital magnetization of the spin-1/2 Haldane-Hubbard model2019In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 100, no 5, p. 054427-1-054427-8, article id 054427Article in journal (Refereed)
    Abstract [en]

    Orbital magnetization is known empirically to play an important role in several magnetic phenomena, suchas permanent magnetism and ferromagnetic superconductivity. Within the recently developed “modern theoryof orbital magnetization,” theoretical insight has been gained into the nature of this often neglected contributionto magnetism but is based on an underlying mean-field approximation. From this theory, a few treatments haveemerged which also take into account correlations beyond the mean-field approximation. Here, we apply thes cheme developed in a previous work [F. Aryasetiawan et al., Phys. Rev. B 93, 161104(R) (2016)] to thespin- 1/2 Haldane-Hubbard model to investigate the effect of charge fluctuations on the orbital magnetizationwithin the GW approximation. Qualitatively, we are led to distinguish between two quite different situations:(i) When the lattice potential is larger than the nearest-neighbor hopping, the correlations are found to boostthe orbital magnetization. (ii) If the nearest-neighbor hopping is instead larger than the lattice potential, thecorrelations reduce the magnetization. The boost and reduction are identified to stem from interband andintraband correlations, respectively, and the relative importance of the two varies with the strength of the latticepotential. We finally study graphene with parameters obtained from first principles.

  • 18.
    Sottile, F.
    et al.
    Laboratoire des Solides Irradiés UMR, Palaiseau, France.
    Karlsson, Krister
    University of Skövde, Department of Natural Sciences.
    Reining, L.
    Laboratoire des Solides Irradiés UMR, Palaiseau, France.
    Aryasetiawan, F.
    Research Institute for Computational Sciences (RICS), Japan.
    Macroscopic and microscopic components of exchange-correlation interactions2003In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 68, no 20, p. 205112-205122, article id 205112Article in journal (Refereed)
    Abstract [en]

    We consider two commonly used approaches for the ab initio calculation of optical-absorption spectra, namely, many-body perturbation theory based on Green’s functions and time-dependent density-functional theory (TDDFT). The former leads to the two-particle Bethe-Salpeter equation that contains a screened electron-hole interaction. We approximate this interaction in various ways, and discuss in particular the results obtained for a local contact potential. This, in fact, allows us to straightforwardly make the link to the TDDFT approach, and to discuss the exchange-correlation kernel fxc that corresponds to the contact exciton. Our main results, illustrated in the examples of bulk silicon, GaAs, argon, and LiF, are the following. (i) The simple contact exciton model, used on top of an ab initio calculated band structure, yields reasonable absorption spectra. (ii) Qualitatively extremely different fxc can be derived approximatively from the same Bethe-Salpeter equation. These kernels can however yield very similar spectra. (iii) A static fxc, both with or without a long-range component, can create transitions in the quasiparticle gap. To the best of our knowledge, this is the first time that TDDFT has been shown to be able to reproduce bound excitons.

  • 19.
    Ulfat, I.
    et al.
    Department of Physics, University of Karachi, Pakistan.
    Kanski, J.
    Chalmers University of Technology, Göteborg, Sweden.
    Ilver, L.
    Chalmers University of Technology, Göteborg, Sweden.
    Sadowski, J.
    MAX-IV laboratory, Lund University, Sweden.
    Karlsson, Krister
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ernst, A.
    Max-Planck-Institut für Mikrostrukturphysik, Halle, Germany / Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Germany.
    Sandratskii, L.
    Max-Planck-Institut für Mikrostrukturphysik, Halle, Germany.
    Effects of nonuniform Mn distribution in (Ga,Mn)As2014In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 89, no 4, p. 1-5, article id 045312Article in journal (Refereed)
    Abstract [en]

    Resonant in situ photoemission from Mn 3d states in Ga(1−x)MnxAs is reported for Mn concentrations down to the very dilute level of 0.1%. Concentration-dependent spectral features are analyzed on the basis of first-principles calculations for systems with selected impurity positions as well as for random alloys. Effects of direct Mn-Mn interaction are found for concentrations as low as 2.5%, and are ascribed to statistical (nonuniform) distribution of Mn atoms.

  • 20.
    Walleczek, Jan
    et al.
    Phenoscience Laboratories, Berlin, Germany.
    Grössing, Gerhard
    Austrian Institute for Nonlinear Studies, Akademiehof, Austria.
    Pylkkänen, Paavo
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Department of Philosophy, History, and Art Studies, University of Helsinki, Helsinki, Finland.
    Hiley, Basil
    Department of Physics and Astronomy, University College London, London, United Kingdom.
    Emergent quantum mechanics: David Bohm Centennial perspectives2019In: Entropy, ISSN 1099-4300, E-ISSN 1099-4300, Vol. 21, no 2, article id 113Article in journal (Refereed)
    Abstract [en]

    Emergent quantum mechanics (EmQM) explores the possibility of an ontology for quantum mechanics. The resurgence of interest in realist approaches to quantum mechanics challenges the standard textbook view, which represents an operationalist approach. The possibility of an ontological, i.e., realist, quantum mechanics was first introduced with the original de Broglie-Bohm theory, which has also been developed in another context as Bohmian mechanics. This Editorial introduces a Special Issue featuring contributions which were invited as part of the David Bohm Centennial symposium of the EmQM conference series (www.emqm17.org). Questions directing the EmQM research agenda are: Is reality intrinsically random or fundamentally interconnected? Is the universe local or nonlocal? Might a radically new conception of reality include a form of quantum causality or quantum ontology? What is the role of the experimenter agent in ontological quantum mechanics? The Special Issue also includes research examining ontological propositions that are not based on the Bohm-type nonlocality. These include, for example, local, yet time-symmetric, ontologies, such as quantum models based upon retrocausality. This Editorial provides topical overviews of thirty-one contributions which are organized into seven categories to provide orientation. 

  • 21.
    Walleczek, Jan
    et al.
    Phenoscience Laboratories, Berlin, Germany.
    Grössing, GerhardAustrian Institute for Nonlinear Studies, Vienna, Austria.Pylkkänen, PaavoUniversity of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Department of Philosophy, History, and Art Studies, University of Helsinki, Helsinki, Finland.Hiley, BasilUniversity College of London, UK.
    Emergent Quantum Mechanics: David Bohm Centennial Perspectives2019Collection (editor) (Refereed)
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