3 papers
cond-mat.mes-hall2025
Heat-to-motion conversion for quantum active matter
Alexander-Georg Penner, Ludmila Viotti, Rosario Fazio +2
We introduce a model of an active quantum particle and discuss its properties. The particle has a set of internal states that mediate exchanges of heat with external reservoirs. He…
cond-mat.stat-mech2025
Subharmonic spin correlations and spectral pairing in Floquet time crystals
Alexander-Georg Penner, Harald Schmid, Leonid I. Glazman +1
Floquet time crystals are characterized by subharmonic behavior of temporal correlation functions. Studying the paradigmatic time crystal based on the disordered Floquet quantum Is…
cond-mat.dis-nn2020
Hilbert-space geometry of random-matrix eigenstates
Alexander-Georg Penner, Felix von Oppen, Gergely Zarand +1
The geometry of multi-parameter families of quantum states is important in numerous contexts, including adiabatic or nonadiabatic quantum dynamics, quantum quenches, and the charac…