Quench dynamics of the Ising field theory in a magnetic field
Kristóf Hódsági, Márton Kormos, Gábor Takács
SciPost Phys. 5, 027 (2018) · published 25 September 2018
- doi: 10.21468/SciPostPhys.5.3.027
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Abstract
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.
Cited by 33
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Kristóf Hódsági,
- 1 2 Márton Kormos,
- 1 Gábor Takács
- 1 Budapesti Műszaki és Gazdaságtudományi Egyetem / Budapest University of Technology and Economics [BUTE]
- 2 Magyar Tudományos Akadémia / Hungarian Academy of Sciences [MTA]
- Emberi Eroforrások Minisztériuma (through Organization: Emberi Erőforrások Minisztérium / Ministry of Human Capacities [Emmi])
- Nemzeti Kutatási, Fejlesztési és Innovációs Hivatal / National Research, Development and Innovation Office [NKFIH]