Nonequilibrium Many-Body Quantum Matter Theory Group
We are studying the theory of nonequilibrium quantum many-body systems at Department of Physics, Osaka Metropolitan University.
Theory of Nonequilibrium Quantum Many-Body Physics at the Interface between Condensed Matter Physics, AMO Physics, and Quantum Information
Our research group conducts theoretical studies in quantum many-body systems, focusing on nonequilibrium physics, statistical mechanics, and quantum information. Recent advances in ultracold atoms have enabled the realization of open quantum systems, where controllable parameters allow access to novel quantum states and nonequilibrium phase transitions. Despite these developments, the role of strong correlation effects under dissipation remains far from fully understood. In collaboration with experimental groups, we investigate nonequilibrium quantum many-body phenomena arising from the interplay between dissipation and strong correlations.
Recent Research Discovery of Anomalous Fluctuations and Universality in Atom-Detection Counts--A New Indicator for Probing Quantum Many-Body Physics through Measurement Records--
In recent years, quantum phenomena induced by measurements such as entanglement transitions have attracted growing interest across several fields, including quantum information science, AMO physics, and statistical physics. We have demonstrated that, although the fluctuation for the whole system are trivial, nontrivial measurement-induced many-body effects emerge in subsystem fluctuations. We have further shown that this behavior appears independently of model parameters in typical quantum many-body spin models, suggesting the existence of a novel universality. Notably, fluctuations of measurement outcomes do not require postselection, making them experimentally accessible at very low cost.
Students and Postdocs
We welcome motivated students and postdocs
We are always looking for motivated students and postdocs. To join our group as a student, you need to apply for admission to Department of Physics, Osaka Metropolitan University. We also support a postdoc application for JSPS fellowship.
Recent Activities
2026
Prof. Yamamoto has given an invited talk in Workshop on non-Hermitian gravitational physics - Tokyo Metropolitan University, Japan
Prof. Yamamoto has participated Workshop on Ultracold Atoms - Yugawara, Japan, as one of the organizers
Original paper "Anomalous waiting-time distributions in postselection-free quantum many-body dynamics under continuous monitoring" has been published in Quantum Science and Technology
Original paper "Complex nonlinear sigma model" has been published in Physical Review B and selected for Edtitor's Suggestion
More activities