21 citations · 39 across the 9 of their papers we have counts for
9 papers
Open Quantum Theory of Shot Noise in Dissipative Chiral Transport
Ming Gong, Masahito Ueda
We develop an open quantum theory for shot-noise dynamics in dissipative chiral transport. By mapping a system under consideration onto a quantum circuit, we show that current nois…
Renormalization of Quantum Operations: Parity-Time Transition and Chaotic Flows
Atsushi Oyaizu, Hongchao Li, Masaya Nakagawa +1
The renormalization group (RG) in statistical physics focuses on ground-state properties of equilibrium systems. However, it is unclear how it should be generalized to nonunitary q…
Topological Characterization of Discrete-Time Classical Stochastic Processes: Dual Role of Point-Gap Topology
Masaya Nakagawa, Masahito Ueda
We present topological characterization of classical stochastic processes described by discrete-time Markov chains on lattices. We point out that point-gap topology of stochastic m…
Ward-Takahashi Identity and Gauge-Invariant Response Theory for Open Quantum Systems
Hongchao Li, Xie-Hang Yu, Masaya Nakagawa +1
We derive the Ward-Takahashi identity and establish the gauge-invariant response theory for open quantum systems described by Lindbladians to show that particle-number conservation…
Non-Hermitian Renormalization Group from a Few-Body Perspective
Hiroyuki Tajima, Masaya Nakagawa, Haozhao Liang +1
Non-Hermiticity plays a fundamental role in open quantum systems and describes a wide variety of effects of interactions with environments, including quantum measurement. However,…
Dissipative Superfluidity in a Molecular Bose-Einstein Condensate
Hongchao Li, Xie-Hang Yu, Masaya Nakagawa +1
Motivated by recent experimental realization of a Bose-Einstein condensate (BEC) of dipolar molecules, we develop superfluid transport theory for a dissipative BEC to show that a w…
Quantum master equation for many-body systems: Derivation based on the Lieb-Robinson bound
Koki Shiraishi, Masaya Nakagawa, Takashi Mori +1
The local Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) quantum master equation is a powerful tool for the study of open quantum many-body systems. However, its microscopic derivati…
Topology of Discrete Quantum Feedback Control
Masaya Nakagawa, Masahito Ueda
A general framework for analyzing the topology of quantum channels of single-particle systems is developed to find a class of genuinely dynamical topological phases that can be rea…
Experimental observation of the Yang-Lee quantum criticality in open systems
Huixia Gao, Kunkun Wang, Lei Xiao +6
The Yang-Lee edge singularity was originally studied from the standpoint of mathematical foundations of phase transitions, and its physical demonstration has been of active interes…