6 papers
Kubo-Martin-Schwinger relation for energy eigenstates of SU(2)-symmetric quantum many-body systems
Jae Dong Noh, Aleksander Lasek, Jade LeSchack +1
The fluctuation-dissipation theorem (FDT) is a fundamental result in statistical mechanics. It stipulates that, if perturbed out of equilibrium, a system responds at a rate proport…
Nonlinear Bell inequality for macroscopic measurements
Adam Bene Watts, Nicole Yunger Halpern, Aram Harrow
The correspondence principle suggests that quantum systems grow classical when large. Classical systems cannot violate Bell inequalities. Yet agents given substantial control can v…
Noncommuting conserved quantities in quantum many-body thermalization
Nicole Yunger Halpern, Michael E. Beverland, Amir Kalev
In statistical mechanics, a small system exchanges conserved quantities---heat, particles, electric charge, etc.---with a bath. The small system thermalizes to the canonical ensemb…
Fundamental limitations on photoisomerization from thermodynamic resource theories
Nicole Yunger Halpern, David T. Limmer
Small, out-of-equilibrium, and quantum systems defy simple thermodynamic expressions. Such systems are exemplified by molecular switches, which exchange heat with a bath. These mol…
Out-of-Time-Ordered-Correlator Quasiprobabilities Robustly Witness Scrambling
José Raúl González Alonso, Nicole Yunger Halpern, Justin Dressel
Out-of-time-ordered correlators (OTOCs) have received considerable recent attention as qualitative witnesses of information scrambling in many-body quantum systems. Theoretical dis…
Entropic uncertainty relations for quantum information scrambling
Nicole Yunger Halpern, Anthony Bartolotta, Jason Pollack
How violently do two quantum operators disagree? Different fields of physics feature different measures of incompatibility: (i) In quantum information theory, entropic uncertainty…