4 papers
Non-ergodic dynamical phase transition via a zero-mode exceptional point in a non-Markov atomic Josephson junction
Koichiro Furutani
Open quantum systems typically lose their initial memory due to the environmental decoherence resulting in thermalization. We demonstrate a striking breakdown of this paradigm in a…
Dynamical axion fields coupled with one-dimensional spinless fermions
Yuto Hosogi, Koichiro Furutani, Yuki Kawaguchi
We investigate coupled dynamics of spinless fermions on a one-dimensional lattice and spins on the links. When the hopping integral and the on-site potential of the fermions depend…
Interaction-induced dissipative quantum phase transition in a head-to-tail atomic Josephson junction
Koichiro Furutani, Luca Salasnich
We propose a dissipative phase transition in a head-to-tail Bose Josephson junction. The quantum phase transition has the same origin as the one in a resistively shunted Josephson…
Amplitude, phase, and topological fluctuations shaping the complex phase diagram of two-dimensional superconductors
Koichiro Furutani, Giovanni Midei, Andrea Perali +1
We study the amplitude and phase fluctuations of the Ginzburg-Landau quasiorder parameter for superconductors in two spatial dimensions. Starting from the mean-field critical tempe…