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Wigner 111 - Colourful and Deep

11–14 Nov 2013
Hungarian Academy of Sciences
Europe/Budapest timezone

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Session

Foundations of Physics

12 Nov 2013, 08:30
Ceremonial Hall (Díszterem) (Hungarian Academy of Sciences)

Ceremonial Hall (Díszterem)

Hungarian Academy of Sciences

9. Széchenyi István Square, 1051 Budapest

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  1. 28. Branched Hamiltonians and Supersymmetry
    Prof. Thomas L. Curtright (University of Miami, USA)
    12/11/2013, 08:30
  2. 29. Deformation quantization: Quantum mechanics lives and works in phase‐space
    Prof. Cosmas K. Zachos (Argonne National Laboratory, USA)
    12/11/2013, 08:55
    Wigner's 1932 quasi-probability Distribution Function in phase-space, his first paper in English, is a special (Weyl) representation of the density matrix. It has been useful in describing quantum flows in semiclassical limits; quantum optics; nuclear physics; decoherence (eg, quantum computing); quantum chaos; "Welcher Weg" puzzles. It is also of great importance in signal processing...
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  3. 30. A cellular automaton perspective on the linearity of quantum mechanics
    Prof. Hans Thomas Elze (Universitá di Pisa. Italy)
    12/11/2013, 09:20
    The linearity of quantum mechanics leads to the superposition principle and interference, entailing entanglement, and the enigmatic phenomena of Schrődinger's Cat and Wigner's Friend. We introduce an action principle for a class of integer valued cellular automata and obtain Hamiltonian equations of motion. Employing sampling theory, these discrete deterministic equations are invertibly...
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  4. 63. Newton Force from Wave Function Collapse: a Testable Emergence Time
    Dr Lajos Diósi
    12/11/2013, 09:45
    Wigner, to illustrate the inevitable influence of environmental noise on macroscopic quantum objects, estimated that even in intergalactic space a 1cm solid looses its wave function in about 1s due to cosmic background radiation. One of the hypothetic models of quantum-classical boundary is gravity-related spontaneous wave function collapse (Diosi-Penrose model). Recently I have extended the...
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  5. 85. Classical and Quantum Parts in Madelung Variables
    Dr Péter Ván (Wigner RCP of the HAS)
    12/11/2013, 10:30
    We consider the special and general relativistic extensions of the action principle behind the Schrödinger equation distinguishing classical and quantum contributions via the use of Madelung variables for the wave function field. Postulating a particular quantum correction to the source term in the classical Einstein equation we identify the conformal content of the above action and obtain...
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  6. 86. Operational Geometry on de Sitter Spacetime
    Prof. Chryssomalis Chryssomalakos
    12/11/2013, 10:55
    Traditional geometry employs idealized concepts like that of a point or a curve, the operational definition of which relies on the availability of classical point particles as probes. Real, physical objects are quantum in nature though, leading us to consider the implications of using realistic probes in defining an effective spacetime geometry. As an example, we consider de Sitter...
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  7. 81. The Unreasonable Effectiveness of Supersymmetry
    Prof. Volker Schomerus (DESY, Theory Group)
    12/11/2013, 11:20
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