792 citations · 5.2k across the 61 of their papers we have counts for
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Englert-Brout-Higgs Mechanism in Nonrelativistic Systems
Haruki Watanabe, Hitoshi Murayama
We study the general theory of Englert-Brout-Higgs mechanism without assuming Lorentz invariance. In the presence of a finite expectation value of non-Abelian matter charges, gaugi…
Nambu-Goldstone bosons with fractional-power dispersion relations
Haruki Watanabe, Hitoshi Murayama
We pin down the origin of a peculiar dispersion relation of domain wall fluctuation, the so-called ripplon, in a superfluid-superfluid interface. A ripplon has a dispersion relatio…
Effective Lagrangian for Nonrelativistic Systems
Haruki Watanabe, Hitoshi Murayama
The effective Lagrangian for Nambu-Goldstone bosons (NGBs) in systems without Lorentz invariance has a novel feature that some of the NGBs are canonically conjugate to each other,…
Noncommuting Momenta of Topological Solitons
Haruki Watanabe, Hitoshi Murayama
We show that momentum operators of a topological soliton may not commute among themselves when the soliton is associated with the second cohomology of the target space. The c…
Massive Nambu-Goldstone Bosons
Haruki Watanabe, Tomáš Brauner, Hitoshi Murayama
Nicolis and Piazza have recently pointed out the existence of Nambu-Goldstone-like excitations in relativistic systems at finite density, whose gap is exactly determined by the che…
Unified Description of Nambu-Goldstone Bosons without Lorentz Invariance
Haruki Watanabe, Hitoshi Murayama
Using the effective Lagrangian approach, we clarify general issues about Nambu-Goldstone bosons without Lorentz invariance. We show how to count their number and study their disper…