Tag

Many Body Localization

All articles tagged with #many body localization

science1 year ago•9 min saved

"Unraveling Eternal Stability: The Quantum Trick's Downfall"

Physicists have been debating the stability of a quantum phenomenon known as many-body localization (MBL) in one-dimensional chains. Recent research has challenged the long-held belief in the eternal stability of MBL, with the discovery of a new thermalization-causing phenomenon called avalanches. These findings have led to a reevaluation of the MBL phase diagram, suggesting that MBL may not be as stable as previously thought. The debate revolves around a mathematical proof of MBL's existence, with researchers working to either contradict or verify it. While the stability of MBL remains uncertain, physicists are excited about the opportunity to discover new phenomena in quantum systems.

via Quanta Magazine|

#avalanche #many-body-localization #mathematical-proof

physics1 year ago•6 min saved

"Unveiling the Constraints of Many-Body Localization in Physics"

Theoretical work sheds light on the phenomenon of many-body localization (MBL), where some quantum systems fail to reach thermal equilibrium due to being locally stuck. Recent research has identified three regimes in inhomogeneous quantum systems: an ergodic phase, an MBL phase, and an intervening "MBL regime." Empirical findings have been reconciled with theory, revealing that the MBL phase may be physically inaccessible due to exponentially sensitive timescales. The work has also raised questions about the dynamical signatures of the MBL regime and its potential applications in optimization problems and quantum algorithms.

via Physics|

#ergodicity #many-body-localization #nonergodic-systems

physics2 years ago•4 min saved

"Quantum and Neuronal Avalanches: Insights and Innovations"

Researchers at Harvard University have observed the onset of quantum avalanches in a many-body localized system for the first time. Many-body localization occurs when a system made of interacting particles fails to reach thermal equilibrium even at high temperatures. The researchers placed cold atoms in a potential that they built out of precisely shaped laser beams and observed how the particles would spread. They found that particles from the non-disordered region started to spread to the disordered one at an increasing speed, suggesting the onset of a quantum avalanche. These findings could inspire new experiments aimed at further probing quantum avalanches and assessing the robustness of localization in strongly interacting many-body systems.

via Phys.org|

#cold-atoms #harvard-university #many-body-localization