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Temporally, Spatially or Light-like Modulated Vacua in Lorentz Invariant Theories

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arxiv 1810.11361 v2 pith:AEGJL6HA submitted 2018-10-26 hep-th

Sven Bjarke Gudnason , Muneto Nitta , Shin Sasaki , Ryo Yokokura This is my paper
classification hep-th
keywords vacuamodulatedlight-likeinvariantlorentzmodestemporaltheories
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We study the vacuum structure of a class of Lorentz invariant field theories where the vacuum expectation values are not constant but are (phase) modulated. The vacua are classified into spatial, temporal, and light-like modulation types according to the patterns of spontaneous breaking of translational symmetry. The conditions for having temporal or light-like modulated vacua imply severe constraints on the models. We utilize the notion of generalized Nambu-Goldstone modes which appear in the modulated vacua. Finally, we examine fluctuation modes around these vacua and discuss their dynamics and the absence of ghosts.

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  1. Dislocations and crystallization dynamics of chiral soliton lattices

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    A modified axion model with a B-dependent topological coupling shows numerically that chiral soliton lattices form dynamically through transient edge and screw dislocations, including a stable DNA-like double helix.

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