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Träfflista för sökning "LAR1:cth srt2:(1980-1989)"

Search: LAR1:cth > (1980-1989)

  • Result 91-100 of 1313
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91.
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92.
  • Bengtsson, Anders K.H., et al. (author)
  • Particles, superparticles and twistors
  • 1987
  • In: Phys. Rev. D36 (1987) 1766.
  • Journal article (peer-reviewed)abstract
    • The covariant Green-Schwarz action for a superstring has never been quantized covariantly. The physics behind this is discussed. We then consider the corresponding point-particle action in four dimensions, and write down a master action from which it can be obtained as a gauge choice: the ‘‘space-time gauge.’’ There is also a ‘‘twistor gauge,’’ in which covariant quantization is straightforward (as noted previously by Shirafuji).
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93.
  • Bengtsson, Anders K.H., et al. (author)
  • Uniqueness of superstring actions
  • 1984
  • In: Nucl.Phys.B254 (1985) 625.
  • Journal article (peer-reviewed)abstract
    • We consider local counterterms to 4-dimensional gravity and 4- and 10-dimensional super-gravity theories in the light-front gauge. With the technique developed, we show that there are no local counterterms other than the lagrangian possible in the superstring thoeries. This is a strong indication that these theories are finite or at least renormalizable to allorders in the perturbation expansions.
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94.
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95.
  • Bengtsson, Ingemar, et al. (author)
  • Covariant superstrings do not admit covariant gauge fixing
  • 1984
  • Journal article (other academic/artistic)abstract
    • The covariant action for superstrings is analysed by means of the Diracmethod, and the light front action is derived. The action gives riseto second class constraints which cannot be solved for in a covariant way. Covariant gauge fixing, in any conventional sense, cannot be applied, which leaves the question of covariant quantisationof the superstrings open. A similar statement holds for a masslesssupersymmetric point-particle.
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96.
  • Bengtsson, Ingemar, et al. (author)
  • Light cone actions for gravity and higher spins: some further results
  • 1983
  • Journal article (other academic/artistic)abstract
    • It has been suggested that field theories for arbitrary spin can be defined,using the light front formulation of dynamics. The higher order termsin the actions are discussed in this paper. We show that the gravity actioncan be written without ``time''-derivatives in the interaction termsin a way which appears generalisable to higher spin. Some problems forhigher spins are identified and briefly discussed.
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97.
  • Bengtsson, Ingemar, et al. (author)
  • Particles, twistors and the division algebras
  • 1987
  • In: Nucl.Phys.B302 (1988) 81.
  • Journal article (peer-reviewed)abstract
    • We study twistorial mechanics of particles and super-particles in six dimensions. To this end we formulate (in a general division algebra framework) a twistor theory in D = 6 based on quaternionic numbers, and prove the equivalence between this version of particle dynamics and the ordinary one. The super-twistors define a covariant and gauge invariant concept of a super world-line and allow us to write an action for the supersymmetric particle that is not plagued by the content of second class constraints that prevents a covariant quantization in the space-time picture. The notion and geometry of projectile twistor space, and its connection to Minkowski space, are examined and shown to directly generalize the results in D = 3, 4. Quantization is performed and analytic quaternionic eigenfunctions and integrations are discussed. We also draw some conclusions on the possible generalization to ten dimensions.
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98.
  • Bengtsson, Ingemar, et al. (author)
  • What's the matter with the Green-Schwarz action?
  • 1987
  • In: Phys.Lett.B203 (1988) 96.
  • Journal article (peer-reviewed)abstract
    • The Green-Schwarz action describes only states with positive energy. We explain how this obstructs covariant quantisation.
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99.
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100.
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  • Result 91-100 of 1313
Type of publication
journal article (481)
reports (357)
conference paper (303)
licentiate thesis (78)
doctoral thesis (29)
book chapter (27)
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book (23)
editorial collection (8)
other publication (5)
research review (2)
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Type of content
other academic/artistic (698)
peer-reviewed (615)
Author/Editor
Wiberg, Nils-Erik, 1 ... (100)
Nordén, Bengt, 1945 (80)
Skarnemark, Gunnar, ... (77)
Berntsson, Thore, 19 ... (64)
Runesson, Kenneth, 1 ... (58)
Svensson, Arne, 1955 (50)
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Engström, Tomas, 195 ... (40)
Tägnfors, Harald, 19 ... (35)
Tepfers, Ralejs, 193 ... (33)
Andersson, Karin, 19 ... (31)
Sundberg, Carl-Erik (29)
Leckner, Bo G, 1936 (28)
Allard, Bert (27)
Boström, Anders E, 1 ... (26)
Nyström, Maria, 1955 (25)
Samuelsson, Alf, 192 ... (25)
Bergdahl, Lars, 1943 (24)
Larsson, Lars, 1945 (24)
Franck, Per-Åke, 195 ... (20)
Larson, Sven Åke, 19 ... (18)
Torstenfelt, Börje (18)
Jonson, Björn, 1941 (17)
Egardt, Bo, 1950 (17)
Larsson, Ragnar, 196 ... (16)
Olsson, Peter, 1956 (15)
Sandberg, Ann-Sofie, ... (15)
Gromark, Sten, 1951 (15)
Lyngfelt, Sven, 1947 (14)
Lennartson, Bengt, 1 ... (14)
Kubista, Mikael, 196 ... (14)
Panas, Itai, 1959 (13)
Cederwall, Martin, 1 ... (13)
Tullborg, Eva-Lena (13)
Hansen, P. G. (12)
Löfdahl, Lennart, 19 ... (11)
Åmand, Lars-Erik, 19 ... (11)
Tillman, Anne-Marie, ... (11)
Nyman, Göran Hugo, 1 ... (10)
Aulin, Tor, 1948 (10)
Petersson, Göran, 19 ... (10)
Wahlgren, Ulf (10)
Siegbahn, Per E. M. (9)
Dybjer, Peter, 1953 (9)
Lundquist, Knut, 193 ... (9)
Hedelin, Per, 1948 (9)
Graslund, A (9)
Lycksell, P O (9)
Svanberg, Ulf, 1945 (9)
Simonson, Rune, 1935 (9)
Munch, Karin, 1954 (9)
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University
Chalmers University of Technology (1313)
University of Gothenburg (60)
Jönköping University (7)
RISE (7)
Lund University (1)
Language
English (1008)
Swedish (282)
German (15)
Russian (4)
Latvian (2)
French (1)
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Polish (1)
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Research subject (UKÄ/SCB)
Engineering and Technology (829)
Natural sciences (456)
Social Sciences (45)
Medical and Health Sciences (34)
Humanities (16)
Agricultural Sciences (10)

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