{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:56:44Z","timestamp":1760147804386,"version":"build-2065373602"},"reference-count":57,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2023,3,5]],"date-time":"2023-03-05T00:00:00Z","timestamp":1677974400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>In this work, we explore the effects of quantum quenching on the circuit complexity of quenched quantum field theory with weakly coupled quartic interactions. We use the invariant operator method under a perturbative framework to compute the ground state of this system. We give the analytical expressions for specific reference and target states using the ground state of the system. Using a particular cost functional, we show the analytical computation of circuit complexity for the quenched and interacting field theory. Furthermore, we give a numerical estimate of circuit complexity with respect to the quench rate, \u03b4t, for two coupled oscillators. The parametric variation in the unambiguous contribution of the circuit complexity for an arbitrary number of oscillators has been studied with respect to the dimensionless parameter (t\/\u03b4t). We comment on the variation in the circuit complexity for different values of coupling strength, different numbers of oscillators and even in different dimensions.<\/jats:p>","DOI":"10.3390\/sym15030655","type":"journal-article","created":{"date-parts":[[2023,3,6]],"date-time":"2023-03-06T05:18:43Z","timestamp":1678079923000},"page":"655","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Circuit Complexity in Interacting Quenched Quantum Field Theory"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0459-3873","authenticated-orcid":false,"given":"Sayantan","family":"Choudhury","sequence":"first","affiliation":[{"name":"Centre For Cosmology and Science Popularization (CCSP), SGT University, Gurugram, Delhi-NCR, Haryana 122505, India"}]},{"given":"Rakshit Mandish","family":"Gharat","sequence":"additional","affiliation":[{"name":"Department of Physics, National Institute of Technology Karnataka, Surathkal, Karnataka 575025, India"}]},{"given":"Saptarshi","family":"Mandal","sequence":"additional","affiliation":[{"name":"Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India"}]},{"given":"Nilesh","family":"Pandey","sequence":"additional","affiliation":[{"name":"Department of Applied Physics, Delhi Technological University, Delhi 110042, India"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"06002","DOI":"10.1088\/1742-5468\/2004\/06\/P06002","article-title":"Entanglement entropy and quantum field theory","volume":"2004","author":"Calabrese","year":"2004","journal-title":"J. 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