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Updated: Jun 3, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Quantum relaxation after a quench in systems with boundaries
1Research Institute for Solid State Physics and Optics, H-1525 Budapest, Post Office Box 49, Hungary.
Physical Review Letters
|March 17, 2011
Summary
We investigated the quantum Ising chain
Area of Science:
- Quantum physics
- Condensed matter physics
Background:
- The study focuses on the time evolution of magnetization in quantum systems.
- Understanding non-equilibrium dynamics is crucial in quantum many-body systems.
Purpose of the Study:
- To analyze the time-dependent magnetization profile of a finite open quantum Ising chain after a quench.
- To identify novel time scales and thermalization behavior in such systems.
Main Methods:
- Numerical simulation of a large finite open quantum Ising chain.
- Analysis of the local magnetization profile m(l)(t) over time.
Main Results:
- Observed cyclic variation in magnetization: exponential decrease, quasistationary regime, and exponential reconstruction.
- Nonthermal behavior at near-surface sites transitions to thermal behavior in bulk sites.
- Identified a nonstandard time scale during the reconstruction period.
Conclusions:
- The quantum Ising chain exhibits complex dynamics including cyclic magnetization changes and distinct surface/bulk thermalization.
- A new time scale characterizes the reconstruction phase, offering deeper insights into non-equilibrium quantum dynamics.
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