SEMINARIUM INSTYTUTOWE

Dnia: 27.10.2025 roku (poniedziałek)
o godzinie 13:00 w auli Instytutu

referat pt.:

Subsystem Resetting as a way of controlling phases in many-body interacting systems

wygłosi

mgr Anish Acharya

Tata Institute of Fundamental Research, Mumbai, India, The Nordic Institute for Theoretical Physics (Nordita), Stockholm, Sweden

Stabilising unstable phases in many-body interacting systems is a longstanding challenge. In this work, we use subsystem resetting as a minimally invasive protocol to control such systems. The idea is simple:  only a chosen subpart of the full system is stochastically reset to a fixed configuration, while the rest part evolves freely, and we ask what happens to some order parameter at steady state. This avoids global interventions and fine-tuning of couplings.

We have applied this protocol across a wide class of models, namely, mean-field spin models and the noisy Kuramoto oscillator system. In this talk, I will focus on the application to Kuramoto oscillators. I will demonstrate 1) how resetting a subpart can reproduce the full phase diagram of the original model for the rest of the system, and 2) Systematic manipulation of phase-transition points by adjusting the reset frequency, subsystem size, and reset configuration. These results open up a versatile framework for stabilising or suppressing targeted phases in complex interacting systems.