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Phys. Rev. D 65, 081501(R) (2002) [4 pages]

New transition between discrete and continuous self-similarity in critical gravitational collapse

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Christiane Lechner1,2, Jonathan Thornburg1,2, Sascha Husa2, and Peter C. Aichelburg1
1Institut für Theoretische Physik, Universität Wien, Boltzmanngasse 5, A-1090 Wien, Austria
2Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Am Mühlenberg 1, D-14476 Golm, Germany

Received 7 December 2001; published 8 April 2002

We analyze a bifurcation phenomenon associated with critical gravitational collapse in a family of self-gravitating SU(2) σ models. As the dimensionless coupling constant decreases, the critical solution changes from discretely self-similar (DSS) to continuously self-similar (CSS). Numerical results provide evidence for a bifurcation which is analogous to a heteroclinic loop bifurcation in dynamical systems, where two fixed points (CSS) collide with a limit cycle (DSS) in phase space as the coupling constant tends to a critical value.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.081501
DOI:
10.1103/PhysRevD.65.081501
PACS:
04.25.Dm, 04.70.Bw