{
  "id": "1307.4369",
  "version": "v1",
  "published": "2013-07-15T14:44:27.000Z",
  "updated": "2013-07-15T14:44:27.000Z",
  "title": "Density-Functional theory, finite-temperature classical maps, and their implications for foundational studies of quantum systems",
  "authors": [
    "M. W. C. Dharma-wardana"
  ],
  "comment": "one figure, http://iopscience.iop.org/1742-6596/442/1/012030",
  "journal": "Journal of Physics (IOP) J. Phys.: Conf. Ser. vol. 442 012030 (2013)",
  "doi": "10.1088/1742-6596/442/1/012030",
  "categories": [
    "quant-ph",
    "physics.class-ph"
  ],
  "abstract": "The advent of the Hohenberg-Kohn theorem in 1964, its extension to finite-T, Kohn-Sham theory, and relativistic extensions provide the well-established formalism of density-functional theory (DFT). This theory enables the calculation of all static properties of quantum systems {\\it without} the need for an n-body wavefunction \\psi. DFT uses the one-body density distribution instead of \\psi. The more recent time-dependent formulations of DFT attempt to describe the time evolution of quantum systems without using the time-dependent wavefunction. Although DFT has become the standard tool of condensed-matter computational quantum mechanics, its foundational implications have remained largely unexplored. While all systems require quantum mechanics (QM) at T=0, the pair-distribution functions (PDFs) of such quantum systems have been accurately mapped into classical models at effective finite-T, and using suitable non-local quantum potentials (e.g., to mimic Pauli exclusion effects). These approaches shed light on the quantum \\to hybrid \\to classical models, and provide a new way of looking at the existence of non- local correlations without appealing to Bell's theorem. They also provide insights regarding Bohmian mechanics. Furthermore, macroscopic systems even at 1 Kelvin have de Broglie wavelengths in the micro-femtometer range, thereby eliminating macroscopic cat states, and avoiding the need for {\\it ad hoc} decoherence models.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-07-15T14:44:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum systems",
      "finite-temperature classical maps",
      "density-functional theory",
      "foundational studies",
      "implications"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Journal of Physics Conference Series",
      "year": 2013,
      "month": "Jun",
      "volume": 442,
      "number": 1,
      "pages": "012030"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013JPhCS.442a2030D"
    }
  }
}