197 citations · 794 across the 18 of their papers we have counts for
5 papers · 1 filter
Effective-Hamiltonian theory: An approximation to the equilibrium state of open quantum systems
Nicholas Anto-Sztrikacs, Brett Min, Marlon Brenes +1
We extend and benchmark the recently-developed Effective-Hamiltonian (EFFH) method [PRX Quantum , 020307 (2023)] as an approximation to the equilibrium state ("mean-force G…
Out-of-time-order correlations and the fine structure of eigenstate thermalisation
Marlon Brenes, Silvia Pappalardi, Mark T. Mitchison +2
Out-of-time-order correlators (OTOCs) have become established as a tool to characterise quantum information dynamics and thermalisation in interacting quantum many-body systems. It…
Low-frequency behavior of off-diagonal matrix elements in the integrable XXZ chain and in a locally perturbed quantum-chaotic XXZ chain
Marlon Brenes, John Goold, Marcos Rigol
We study the matrix elements of local operators in the eigenstates of the integrable XXZ chain and of the quantum-chaotic model obtained by locally perturbing the XXZ chain with a…
Eigenstate Thermalization in a Locally Perturbed Integrable System
Marlon Brenes, Tyler LeBlond, John Goold +1
Eigenstate thermalization is widely accepted as the mechanism behind thermalization in generic isolated quantum systems. Using the example of a single magnetic defect embedded in t…
Multipartite entanglement structure in the Eigenstate Thermalization Hypothesis
Marlon Brenes, Silvia Pappalardi, John Goold +1
We study the quantum Fisher information (QFI) and, thus, the multipartite entanglement structure of thermal pure states in the context of the Eigenstate Thermalization Hypothesis (…