1.5k citations · 6k across the 93 of their papers we have counts for
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Maximum Power of Coupled-Qubit Otto Engines
Jingyi Gao, Naomichi Hatano
We put forward four schemes of coupled-qubit quantum Otto machine, a generalization of the single-qubit quantum Otto machine, based on work and heat transfer between an internal sy…
Multi-Dimensional Quantum Walks: a Playground of Dirac and Schrödinger Particles
Manami Yamagishi, Naomichi Hatano, Ken-Ichiro Imura +1
We propose a new multi-dimensional discrete-time quantum walk (DTQW), whose continuum limit is an extended multi-dimensional Dirac equation, which can be further mapped to the Schr…
Switching the function of the quantum Otto cycle in non-Markovian dynamics: heat engine, heater and heat pump
Miku Ishizaki, Naomichi Hatano, Hiroyasu Tajima
Quantum thermodynamics explores novel thermodynamic phenomena that emerge when interactions between macroscopic systems and microscopic quantum ones go into action. Among various i…
Delocalization of non-Hermitian Quantum Walk on Random Media in One Dimension
Naomichi Hatano, Hideaki Obuse
Delocalization transition is numerically found in a non-Hermitian extension of a discrete-time quantum walk on a one-dimensional random medium. At the transition, an eigenvector ge…
What is the resonant state in open quantum systems?
Naomichi Hatano
The article reviews the theory of open quantum system from a perspective of the non-Hermiticity that emerges from the environment with an infinite number of degrees of freedom. The…
Anomalous-order exceptional point and non-Markovian Purcell effect at threshold in one-dimensional continuum systems
Savannah Garmon, Gonzalo Ordonez, Naomichi Hatano
For a system consisting of a quantum emitter coupled near threshold (band edge) to a one-dimensional continuum with a van Hove singularity in the density of states, we demonstrate…