Bajnok, Zoltán and Fülepi, Dávid and Lencsés, Máté (2026) Expectation values after an integrable boundary quantum quench. JOURNAL OF HIGH ENERGY PHYSICS, 2026. No. 132. ISSN 1126-6708 (nyomtatott); 1029-8479 (Online)
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Abstract
We investigate an integrable boundary quench, in which one integrable boundary condition is suddenly switched to another. We develop a general framework for analyzing the resulting real-time dynamics based on form factors of bulk and boundary-changing operators. We first study the problem at the conformal point of the Lee-Yang model and then extend the analysis to its massive perturbation, where we examine the time evolution of the pre-quench vacuum and compute the vacuum-to-vacuum matrix elements of local operators inserted after the quench. The analytical results are validated by numerical calculations using the truncated conformal space approach adapted to boundary-changing situations.
| Item Type: | Article |
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| Uncontrolled Keywords: | Boundary Quantum Field Theory, Field Theories in Lower Dimensions, Integrable Field Theories |
| Subjects: | Q Science / természettudomány > QC Physics / fizika > QC05 Physical nature of matter / részecskefizika Q Science / természettudomány > QC Physics / fizika > QC06 Physics of condensed matter / szilárdtestfizika |
| Depositing User: | Lencsés Máté |
| Date Deposited: | 22 Sep 2026 08:29 |
| Last Modified: | 22 Sep 2026 08:29 |
| URI: | https://real.mtak.hu/id/eprint/247111 |
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