Summary
In a seven-dimensional model, with quantized Einstein-Cartan gravity and Dirac fermions, we determine the one-loop effective action on a compactified background with «internal» torsion and in the presence of a cosmological constant. We find that, due to a quantum spin condensate, the extremal background cannot have vanishing torsion. We then look for solutions to the effective field equations corresponding to Minkowski space-time and a stable three-dimensional sphere.
Riassunto
In un modello in sette dimensioni, con gravità alla Einstein-Cartan e fermioni di Dirac, si determina il potenziale efficace al primo loop su un background compattificato con torsione «interna» ed in presenza di costante cosmologica. Si trova che, a causa di un condensato quantico di spin, il background estremale non può essere privo di torsione. Si cercano quindi soluzioni delle equazioni di campo efficaci che possano corrispondere al prodotto diretto dello spazio-tempo di Minkowski con una sfera stabile a tre dimensioni.
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References
Th. Kaluza:Sitzungsber. Preuss. Akad. Wiss. Phys. Math. Kl.,1, 966 (1921);O. Klein:Z. Phys.,37, 895 (1926);A. Einstein andP. Bergmann:Ann. Math.,39, 683 (1938);B. S. De Witt: inRelativity, Groups and Topology (Gordon and Breach, New York, N.Y., 1964), p. 725;Y. M. Cho andP. G. O. Freund:Phys. Rev. D,12, 1711 (1975).
E. Witten:Nucl. Phys. B,186, 412 (1981); Princeton report (1983).
M. J. Duff, B. E. W. Nilsson andC. N. Pope:Phys. Rep.,130, 1 (1986).
T. Appelquist andA. Chodos:Phys. Rev. D,28, 772 (1983);A. Chodos andE. Myers:Ann. Phys. (N.Y.),156, 412 (1984);Phys. Rev. D,31, 3064 (1985).
P. Candelas andS. Weinberg:Nucl Phys. B,237, 397 (1984).
M. H. Sarmadi: ICTP preprint IC/84/3 (1984).
C. Destri, C. A. Orzalesi andP. Rossi:Ann. Phys. (N.Y.),147, 321 (1983).
R. Camporesi, C. Destri, G. Melegari andC. A. Orzalesi:Class. Quantum Grav.,2, 461 (1985).
C. A. Orzalesi andG. Venturi:Phys. Lett. B,139, 357 (1984).
M. J. Duff andC. A. Orzalesi:Phys. Lett. B,122, 37 (1983).
F. W. Hehl, P. von der Heyde, G. D. Kerlich andJ. M. Nester:Rev. Mod. Phys.,48, 393 (1976).
R. T. Seeley:Proceedings of the Symposium on Pure Mathematics, Vol.10 (American Mathematical Society, Providence, R. I., 1967), p. 288;P. G. Gilkey:J. Diff. Geom.,10, 601 (1975).
V. N. Romanov andA. S. Schwartz:Teor. Mat. Fiz.,41, 190 (1979);A. O. Barvinsky andG. A. Vilkovisky:Phys. Rep.,119, 1 (1985).
B. S. de Witt: inQuantum Gravity 2, edited byC. J. Isham, R. Penrose andD. W. Sciama (Oxford University Press, Oxford, 1981).
G. Kunstatter andH. P. Leivo:Phys. Lett. B,166, 321 (1985).
G. A. Vilkoviski:Nucl. Phys. B,234, 125 (1984);E. S. Fradkin andA. A. Tseytlin:Nucl. Phys. B,234, 509 (1984).
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Destri, C., Gonnella, G. One-loop spontaneous compactification with torsion and spin. Nuov Cim A 97, 343–358 (1987). https://doi.org/10.1007/BF02734461
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DOI: https://doi.org/10.1007/BF02734461