Modulated ground state of gravity theories with stabilized conformai factor.
In: Physical Review D: Particles, Fields, Gravitation & Cosmology, Jg. 87 (2013-04-15), Heft 8-A, S. 1-13
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Zugriff:
We discuss the stabilization of the conformai factor by higher derivative terms in a conformally reduced R + R² Euclidean gravity theory. The flat spacetime is unstable towards the condensation of modes with nonzero momentum, and they "condense" in a modulated phase above a critical value of the coupling ß of the R² term. By employing a combination of variational, numerical and lattice methods, we show that in the semiclassical limit the corresponding functional integral is dominated by a single nonlinear plane wave of frequency ≈1/√lPI. We argue that the ground state of the theory is characterized by a spontaneous breaking of translational invariance at Planckian scales. [ABSTRACT FROM AUTHOR]
Titel: |
Modulated ground state of gravity theories with stabilized conformai factor.
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Autor/in / Beteiligte Person: | Bonanno, A. ; Reuter, M. |
Zeitschrift: | Physical Review D: Particles, Fields, Gravitation & Cosmology, Jg. 87 (2013-04-15), Heft 8-A, S. 1-13 |
Veröffentlichung: | 2013 |
Medientyp: | serialPeriodical |
ISSN: | 2470-0010 (print) |
DOI: | 10.1103/PhysRevD.87.084019 |
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