Abstract
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 lightlike modulation types according to the patterns of spontaneous breaking of translational symmetry. The conditions for having temporal or lightlike 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.
| Original language | English |
|---|---|
| Article number | 045011 |
| Journal | Physical Review D |
| Volume | 99 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2019 Feb 15 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Temporally, spatially, or lightlike modulated vacua in Lorentz invariant theories. / Gudnason, Sven Bjarke; Nitta, Muneto; Sasaki, Shin; Yokokura, Ryo.
In: Physical Review D, Vol. 99, No. 4, 045011, 15.02.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Temporally, spatially, or lightlike modulated vacua in Lorentz invariant theories
AU - Gudnason, Sven Bjarke
AU - Nitta, Muneto
AU - Sasaki, Shin
AU - Yokokura, Ryo
PY - 2019/2/15
Y1 - 2019/2/15
N2 - 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 lightlike modulation types according to the patterns of spontaneous breaking of translational symmetry. The conditions for having temporal or lightlike 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.
AB - 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 lightlike modulation types according to the patterns of spontaneous breaking of translational symmetry. The conditions for having temporal or lightlike 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.
UR - http://www.scopus.com/inward/record.url?scp=85062350060&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85062350060&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.99.045011
DO - 10.1103/PhysRevD.99.045011
M3 - Article
AN - SCOPUS:85062350060
VL - 99
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 4
M1 - 045011
ER -