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Suppressing quantum fluctuations in classicalization
2013
Europhysics letters
We study vacuum quantum fluctuations of simple Nambu-Goldstone bosons - derivatively coupled single scalar-field theories possessing shift-symmetry in field space. We argue that quantum fluctuations of the interacting field can be drastically suppressed with respect to the free-field case. Moreover, the power-spectrum of these fluctuations can soften to become red for sufficiently small scales. In quasiclassical approximation, we demonstrate that this suppression can only occur for those
doi:10.1209/0295-5075/101/34001
fatcat:23mg24v2sfdzlgjizdsjipj2zu