Journal
SCIPOST PHYSICS
Volume 5, Issue 3, Pages -Publisher
SCIPOST FOUNDATION
DOI: 10.21468/SciPostPhys.5.3.027
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Funding
- BME-Nanotechnology FIKP grant of the Ministry of Human Capacities (BME FIKP-NAT)
- National Research Development and Innovation Office (NKFIH) [K-2016, 119204]
- OTKA [SNN118028]
- Quantum Technology National Excellence Program [2017-1.2.1- NKP-2017- 00001]
- Hungarian Academy of Sciences
- New National Excellence Program of the Ministry of Human Capacities [UNKP-17- 2-I]
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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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