Back to Search
Start Over
Exact results for the criticality of quench dynamics in quantum Ising models
- Publication Year :
- 2009
- Publisher :
- arXiv, 2009.
-
Abstract
- Based on the obtained exact results we systematically study the quench dynamics of a one-dimensional spin-1/2 transverse field Ising model with zero- and finite-temperature initial states. We focus on the magnetization of the system after a sudden change of the external field and a coherent time-evolution process. With a zero-temperature initial state, the quench magnetic susceptibility as a function of the initial field strength exhibits strongly similar scaling behaviors to those of the static magnetic susceptibility, and the quench magnetic susceptibility as a function of the final field strength shows a discontinuity at the quantum critical point. This discontinuity remains robust and always occurs at the quantum critical point even for the case of finite-temperature initial systems, which indicates a great advantage of employing quench dynamics to study quantum phase transitions.<br />Comment: 5 pages, 3 figures
- Subjects :
- Physics
Quantum phase transition
Quantum Physics
Condensed matter physics
Statistical Mechanics (cond-mat.stat-mech)
FOS: Physical sciences
Field strength
Condensed Matter Physics
Magnetic susceptibility
Electronic, Optical and Magnetic Materials
Magnetization
Quantum mechanics
Quantum critical point
Ising model
Quantum Physics (quant-ph)
Quantum
Scaling
Condensed Matter - Statistical Mechanics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....4b61fcdbe39bb5008d766da4063d3b98
- Full Text :
- https://doi.org/10.48550/arxiv.0901.0158