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Quench dynamics of the Ising field theory in a magnetic field
by Kristóf Hódsági, Márton Kormos, Gábor Takács
- Published as SciPost Phys. 5, 027 (2018)
|As Contributors:||Márton Kormos|
|Submitted by:||Kormos, Márton|
|Submitted to:||SciPost Physics|
|Subject area:||Quantum Physics|
We numerically simulate the time evolution of the Ising field theory after quenches starting from the $E_8$ integrable model using the Truncated Conformal Space Approach. The results are compared with two different analytic predictions based on form factor expansions in the pre-quench and post-quench basis, respectively. Our results clarify the domain of validity of these expansions and suggest directions for further improvement. We show for quenches in the $E_8$ model that the initial state is not of the integrable pair state form. We also construct quench overlap functions and show that their high-energy asymptotics are markedly different from those constructed before in the sinh/sine-Gordon theory, and argue that this is related to properties of the ultraviolet fixed point.
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Author comments upon resubmission
We resubmit our manuscript after addressing all questions, comments and requests of the Referees. We found the reports very constructive and useful.
As both Referees suggested the publication of our manuscript, we hope that revised version can appear in SciPost Physics.
List of changes
In our point-by-point replies to the reports we indicate all the changes.