Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP08(2012)054
Keywords
Solitons Monopoles and Instantons; Nonperturbative Effects
Categories
Funding
- ITN network UNILHC [PITN-GA-2009-237920]
- European Union (European Social Fund - ESF)
- Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) - Research Funding Program: THALIS
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We discuss the wrong-sign DBI theory as a prototype for classicalization. The theory lacks a UV completion and has to be defined with a fundamental UV cutoff. We study a quantum-mechanical toy model with similar properties. The model has a fundamental length scale and all physical states have momenta below the inverse of this scale. We show that, despite the terminology, the phenomenon of classicalization is of a quantum nature. Within the toy model it consists essentially of tunnelling through a region that is classically forbidden. The size of this region is proportional to the square root of the energy and can be much larger than the fundamental length scale. We discuss the implications for classicalization in scalar field theories.
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