7 papers
Fate of diffusion under integrability breaking of classical integrable magnets
Jiaozi Wang, Sourav Nandy, Markus Kraft +2
Diffusive transport is a ubiquitous phenomenon, yet the microscopic origin of diffusion in interacting physical systems remains a challenging question, irrespective of whether quan…
Boundary-driven magnetization transport in the spin- XXZ chain: Role of the system-bath coupling strength and timescales
Mariel Kempa, Markus Kraft, Sourav Nandy +4
Understanding the transport properties of quantum many-body systems is a central challenge in condensed matter and statistical physics. Theoretical studies usually rely on two main…
Quantum typicality approach to energy flow between two spin-chain domains at different temperatures
Laurenz Beckemeyer, Markus Kraft, Mariel Kempa +2
We discuss a quantum typicality approach to examine systems composed of two subsystems at different temperatures. While dynamical quantum typicality is usually used to simulate hig…
Random matrix theory universality of current operators in spin- Heisenberg chains
Mariel Kempa, Markus Kraft, Robin Steinigeweg +2
Quantum chaotic systems exhibit certain universal statistical properties that closely resemble predictions from random matrix theory (RMT). With respect to observables, it has rece…
Nontrivial damping of magnetization currents in perturbed spin chains
Mariel Kempa, Markus Kraft, Jiaozi Wang +1
Since perturbations are omnipresent in physics, understanding their impact on the dynamics of quantum many-body systems is a vitally important but notoriously difficult question. O…
Scaling of diffusion constants in perturbed easy-axis Heisenberg spin chains
Markus Kraft, Mariel Kempa, Jiaozi Wang +2
Understanding the physics of the integrable spin-1/2 XXZ chain has witnessed substantial progress, due to the development and application of sophisticated analytical and numerical…