93 citations · 667 across the 57 of their papers we have counts for
8 papers · 1 filter
Lattice simulation with the Majorana positivity
Arata Yamamoto, Tomoya Hayata
While the sign problem of the Dirac fermion is conditioned by the semi-positivity of a determinant, that of the Majorana fermion is conditioned by the semi-positivity of a Pfaffian…
Anomalous transport phenomena from dissipative charge pumping
Tomoya Hayata
The Berry curvature involving time and momentum derivatives, which we term emergent electric field, induces a nondisspative current known as the adiabatic charge pumping or Thoules…
Chiral magnetic effect of light
Tomoya Hayata
We study a photonic analog of the chiral magnetic (vortical) effect. We discuss that the vector component of magnetoelectric tensors plays a role of "vector potential," and its rot…
Quantum Monte Carlo simulation of a two-dimensional Majorana lattice model
Tomoya Hayata, Arata Yamamoto
We study interacting Majorana fermions in two dimensions as a low-energy effective model of a vortex lattice in two-dimensional time-reversal-invariant topological superconductors.…
Topological Properties of the Chiral Magnetic Effect in Multi-Weyl Semimetals
Tomoya Hayata, Yuta Kikuchi, Yuya Tanizaki
We compute the chiral magnetic effect (CME) in multi-Weyl semimetals (multi-WSMs) based on the chiral kinetic theory. Multi-WSMs are WSMs with multiple monopole charges that have n…
Momentum-Space Electromagnetic Induction in Weyl Semimetals
Hiroaki Ishizuka, Tomoya Hayata, Masahito Ueda +1
We theoretically study the effect of the Berry curvature on the transport properties of Weyl semimetals in the nonadiabatic process, which results in nonlinear optical responses. I…
Kinetic Theory and Anomalous Transports in the Presence of Nonabelian Phase-Space Berry Curvatures
Tomoya Hayata, Yoshimasa Hidaka
We construct the kinetic theory in ()-dimensional phase space and time when all abelian and nonabelian phase-space Berry curvatures are nonzero. Then we calculate anomalous t…
Classification of sign-problem-free relativistic fermions on the basis of the Majorana positivity
Tomoya Hayata, Arata Yamamoto
We classify the sign-problem-free relativistic fermion actions on the basis of the Majorana representation. In the Majorana representation, the sign-problem-free condition is given…