Hamiltonian unboundedness vs stability with an application to Horndeski theory

A Hamiltonian density bounded from below implies that the lowest-energy state is stable. We point out, contrary to common lore, that an unbounded Hamiltonian density does not necessarily imply an instability: Stability is indeed a coordinate-independent property, whereas the Hamiltonian density does...

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Veröffentlicht in:	Physical review. D 2018, Vol.98 (10), p.104050, Article 104050
Hauptverfasser:	Babichev, E., Charmousis, C., Esposito-Farèse, G., Lehébel, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Cones Density General Relativity and Quantum Cosmology Gravitational waves High Energy Physics - Theory Parity Physics Stability Stability criteria
Online-Zugang:	Volltext
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