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Cavity control of quantum phase transitions in a two-dimensional Kondo lattice
Jun Mochida, Atac Imamoglu, Yuto Ashida
Cavity quantum electrodynamics offers a route to control quantum phases by using vacuum fluctuations of confined electromagnetic fields. In particular, planar cavities based on pol…
Cavity-enhanced Kondo effect
Jun Mochida, Yuto Ashida
In metals containing magnetic impurities, conduction electrons screen the magnetic impurities and induce the Kondo effect, i.e., the enhancement of the electrical resistance at low…
Cavity Moiré Materials: Controlling Magnetic Frustration with Quantum Light-Matter Interaction
Kanta Masuki, Yuto Ashida
Cavity quantum electrodynamics (QED) studies the interaction between light and matter at the single quantum level and has played a central role in quantum science and technology. C…
Efficient variational approach to dynamics of a spatially extended bosonic Kondo model
Yuto Ashida, Tao Shi, Richard Schmidt +3
We develop an efficient variational approach to studying dynamics of a localized quantum spin coupled to a bath of mobile spinful bosons. We use parity symmetry to decouple the imp…
Variational principle for quantum impurity systems in and out of equilibrium: application to Kondo problems
Yuto Ashida, Tao Shi, Mari Carmen Bañuls +2
We provide a detailed formulation of the recently proposed variational approach [Y. Ashida et al., Phys. Rev. Lett. 121, 026805 (2018)] to study ground-state properties and out-of-…
Solving quantum impurity problems in and out of equilibrium with variational approach
Yuto Ashida, Tao Shi, Mari Carmen Bañuls +2
A versatile and efficient variational approach is developed to solve in- and out-of-equilibrium problems of generic quantum spin-impurity systems. Employing the discrete symmetry h…