792 citations · 5.2k across the 61 of their papers we have counts for
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Electric Field-Induced Skyrmion Crystals via Charged Monopoles in Insulating Helimagets
Haruki Watanabe, Ashvin Vishwanath
Electrons propagating in a magnetically ordered medium experience an additional gauge field associated with the Berry phase of their spin following the local magnetic texture. In c…
Absence of Quantum Time Crystals
Haruki Watanabe, Masaki Oshikawa
In analogy with crystalline solids around us, Wilczek recently proposed the idea of "time crystals" as phases that spontaneously break the continuous time translation into a discre…
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…
Criterion for stability of Goldstone Modes and Fermi Liquid behavior in a metal with broken symmetry
Haruki Watanabe, Ashvin Vishwanath
There are few general physical principles that protect the low energy excitations of a quantum phase. Of these, Goldstone's theorem and Landau Fermi liquid theory are the most rele…
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,…
Spontaneous breaking of spacetime symmetries and the inverse Higgs effect
Tomáš Brauner, Haruki Watanabe
It has been long known that when spacetime symmetry is spontaneously broken, some of the broken generators may not give rise to independent gapless, Nambu-Goldstone excitations. We…
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…