Wydarzenia

Dnia 2026-05-05 o godzinie 13:15 w sali 2011 Wydziału Fizyki UwB, odbędzie się seminarium na którym dr. J. Ernesto Alba-Arroyo z Zakładu Fizyki Jądrowej Wydziału Fizyki Politechniki Warszawskiej wygłosi wykład pt

Local Quantum Cooling for Large Fermi Systems with Pairing.

Serdecznie zapraszamy

Tomasz Karpiuk

Andrzej Maziewski

Local Quantum Cooling for Large Fermi Systems with Pairing.

dr. J. Ernesto Alba-Arroyo

Zakład Fizyki Jądrowej Wydziału Fizyki Politechniki Warszawskiej

We present a unitary framework for local quantum cooling that can be efficiently applied to large-scale Fermi systems. The method introduces local Hermitian operators as a cooling potential while strictly preserving the unitarity of time evolution. Our formulation scales favorably with system size and can be seamlessly integrated into time-dependent density functional theory frameworks. We demonstrate that energy cooling arises from the damping of particle currents and pairing-field fluctuations. Furthermore, we develop a variant of the scheme that allows the particle number to vary in time, enabling controlled density scans. The method is generic and versatile, as illustrated by applications to spin-imbalanced unitary Fermi gases and to nuclear matter in the neutron-star crust. The framework can be naturally extended to include stochastic noise, providing a foundation for studying thermalization in strongly interacting Fermi superfluids.