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Geometrical Approach to Quantum Gravity and Super-String Theory

Research Project

Project/Area Number 63540207
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 核・宇宙線・素粒子
Research InstitutionThe University of Tokyo

Principal Investigator

YONEYA Tamiaki  Univ. of Tokyo, Coll. of Arts Sci., Asso. Prof., 教養学部, 助教授 (10091521)

Co-Investigator(Kenkyū-buntansha) FUJII Yasunori  Univ. of Tokyo, Coll. of Arts Sci., Prof., 教養学部, 教授 (60012308)
WADA Sumio  Univ. of Tokyo, Coll. of Arts Sci., Lect., 教養学部, 講師 (00158693)
ICHINOSE Ikuo  Univ. of Tokyo, Coll. of Arts Sci., Res. Asso., 教養学部, 助手 (20159841)
風間 洋一  東京大学, 教養学部, 助教授 (60144317)
Project Period (FY) 1988 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1990: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1989: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1988: ¥600,000 (Direct Cost: ¥600,000)
KeywordsString Theory / Super-String Theory / Quantum Gravity / Unified Theory / Quantum Cosmology / Cosmological Constant / Fifth Force / Quantum Field Theory / 共形代数 / 統一場理論
Research Abstract

(1) Proposal of a new indeterminacy principle as a possible basis for the unified string theory :
We have proposed to interpret the short-distance properties of the string theory by assuming a new indeterminacy principle which demands that there two dual measures DELTAA and DELTAB of the length scale obeying the relation DELTAADELTAB=lambda^2 with lambda being the Planck length. This naturally explains the decrease of the degrees of the freedom in the high-energy behavior of the string amplitudes.
(2) Proposal of a new action principle describing the structure of the non-perturbative string theory in less-than one dimension :
We have constructed a general mathematical framework in which non-perturbative string theory derived as the double scaling limit from the matrix model is described in a unified and universal way based on the KP hierarchy. In particular, we have proposed an action principle from which the whole structure of the theory, especially, its symmetry property, can be underst … More ood. It can be regarded as a new canonical formalism for 2D quantum gravity replacing the Hamiltonian formalism of the ordinary field theory.
(3) Investigation of effective low-energy theory for the unified string theory :
We have investigated the effect of the dilaton field, which is a characteristic of the effective field theory for strings, on the classical solutions of the black-hole type, and found new solutions in a coupled Einstein-Maxwell-Yang Mills system.
(4) Investigation of quantum cosmology :
We have discussed the interpretation of quantum cosmolosy, in particular, the generation of the notion of macroscopic time from the viewpoint of the Van-Hove theory in statistical mechanics.
(5) Investigation of the role of scalar fields in general relativity and cosmology :
We have investigated the effects of scalar fields, in particular, its possible manifestation as the so-called fifth force. We have proposed a scenario which explains the smallness of the cosmological constant as a result of the natural time-dependent dynamics of coupled scalar-gravitational systems. Less

Report

(4 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • 1988 Annual Research Report
  • Research Products

    (39 results)

All Other

All Publications (39 results)

  • [Publications] Antal Tevicki: "Action Principle for strings in lessーthanーone dimension" Mod.Phys.Lett.A4. 1615-1621 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shinsuke Nishigaki: "A nouperturba tive theory of randomly branching chains" Nucl.Phys.B348. 787-807 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yasunori Fugii: "Model of decaying cosmological constant" Phys.Rev.D42. 361-370 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yasunori Fugii: "Soving the mechanism of a decaying coomologicol constant" Mod.Phys.Lett.A4. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Masahiro Yamaguchi: "Ambiguities and BRST anomalies in 4D heterotic string theories" Int.Jour.Mod.Phys.A5. 479-499 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Sumio Wada: "Interpetation and predictability of guantum mechanics and guantum cosmology" Mod.Phys.Lett.A3. 645-651 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tamiadki, Yoneya: "On the interpretation of minimal length in string theories" Mod. Phys. Lett.A4. 1587-1595 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Antal Jevicki and Tamiaki Yoneya: "Action principle for strings in less-than-one dimensions" Mod. Phys. Lett.A5. 1615-1621 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shinsuke Nishigaki and Tamiaki Yoneya: "A nonperturbative theory of randomly branching chains" Nucl. Phys.B348. 787-807 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yasunori Fujii: "New phenomenological analysis based on a scalar-vector model of the fifth force" Phys. Lett.B202. 246-250 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yasuniri Fujii: "Locally varying particle masses due to a scalar fifth-force field" Phys. Lett. B.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yasuniri Fujii: "Saving the mechanism of a decaying cosmological constant" Mod. Phys. Lett.A4. 513-518 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yasunori Fujii and Tsuyoshi Nishioka: "Model of decaying cosmological constant" Phys. Rev.D42. 361-370 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yasunori Fujii and Tsuyoshi Nishioka: "Reconciling a small density parameter to inflation" Phys. Lett. B.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Ikuo Shirai and Sumio Wada: "Cosmological perturbation and quantum fields in curved space" Nucl. Phys.B303. 728-750 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Sumio Wada: "Interpretation and predictability of quantum mechanics and quantum cosmology" Mod. Phys. Lett.A3. 645-651 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Sumio Wada: "Macroscopicity and classicality of quantum fluctuations in de Sitter space" Mod. Phys. Lett.A3. 929-940 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K. Shimizu and Sumio Wada: "Coleman's mechanism for the vanishing of the cosmological constant in the axion wormhole model" Mod. Phys. Lett.A4. 707-712 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Hiroyaki Yamazaki and Ikuo Ichinose: "Charged black hole solutions in superstring theory" Mod. Phys. Lett.A4. 1509-1519 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Masahiro Yamaguchi, Tetsuya Onogi and Ikuo Ichinose: "Ambiguities and BRST anomalies in 4D heterotic string theories" Int. Jour. Mod. Phys.A5. 479-499 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tamiak Yoneya: "On the interpretation of minimal length in string theories" Mod.Phys.Lett.A4. 1587-1595 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Antal Jevicki: "Action principle for strings in lessーthanーone dimension" Mod.Phys.Lett.A5. 1615-1621 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Shinsuke Nishigaki: "A nonperturbative theorg of randomly branching chains" Nucl.Phys.B348. 787-807 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yasunori Fujii: "Saving the mechamism of a decaying coomological constant" Mod.Phys.Lett. A4. 513-518 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Sumio Wada: "Interpretation and predictability of quantum mechanics and quantum cosmology" Mod.Phys.Lett. A3. 645-651 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Hiroyuki Yamazaki: "Charged black hole solutions in superstring theory" Mod.Phys.Lett. A4. 1509-1519 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.YONEYA: "On the interpretation of minimal length in string theories" Modern Physics Letters A. vol.4. 1587-1595 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] I.Ichinose: "Charged black hole solutious in superstring theory" Modern Physics Letters A. vol.4. 1509-1519 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] I.Ichinose: "Ambiquities and BRST anomalies in 4D heterotic string theories" Int.Journ.of Mod.Physics A. 5. 479-500 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Fujii: "Can the fifth jorce be less composition-dependent?" Proc.of the XXIVth Rencontre de Moriond,“Tests of Fundamental Laws in Physics".589-594 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] K.Shimizu: "Coleman's Mechanism for the vanishing of the cosmological constant in the axion wormhole model" Modern Physics Letters A. 4. 707-711 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Tamiaki,Toneya: Phys.Lett.

    • Related Report
      1988 Annual Research Report
  • [Publications] Yoichi,Kazama: Phys.Lett.B. B216. 112 (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] Yoichi,Kazama: Nucl.Phys.B.

    • Related Report
      1988 Annual Research Report
  • [Publications] Sumio,Wada: Mod.Phys.Lett.A3. 929-940 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Shimizu: Mod.Phys.Lett.

    • Related Report
      1988 Annual Research Report
  • [Publications] I.Ichinose: Nucl.Phys.B.

    • Related Report
      1988 Annual Research Report
  • [Publications] Tamiaki,Yoneya :N.Kawamoto and T.Kugo: "論文名"String Theory and Quantum Gravity"in Quantum String Theory" Springer-Verlag, 23-33 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] J.E.Faller:et al. E.Richter: "論文名"Precision experiments to search for the jifth jorce in Proc.of Conf.on Precision Electromaynetic Experimente"" IEEE,

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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