{"title":"振幅无序的振荡驱动下的量子输运","authors":"Vatsana Tiwari, Sushanta Dattagupta, Devendra Singh Bhakuni, Auditya Sharma","doi":"arxiv-2408.12653","DOIUrl":null,"url":null,"abstract":"We investigate the dynamics of non-interacting particles in a one-dimensional\ntight-binding chain in the presence of an electric field with random amplitude\ndrawn from a Gaussian distribution, and explicitly focus on the nature of\nquantum transport. We derive an exact expression for the probability propagator\nand the mean-squared displacement in the clean limit and generalize it for the\ndisordered case using the Liouville operator method. Our analysis reveals that\nin the presence a random static field, the system follows diffusive transport;\nhowever, an increase in the field strength causes a suppression in the\ntransport and thus results in disorder-induced localization. We further extend\nthe analysis for a time-dependent disordered electric field and show that the\ndynamics of mean-squared-displacement deviates from the parabolic path as the\nfield strength increases, unlike the clean limit where ballistic transport\noccurs.","PeriodicalId":501066,"journal":{"name":"arXiv - PHYS - Disordered Systems and Neural Networks","volume":"5 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Quantum transport under oscillatory drive with disordered amplitude\",\"authors\":\"Vatsana Tiwari, Sushanta Dattagupta, Devendra Singh Bhakuni, Auditya Sharma\",\"doi\":\"arxiv-2408.12653\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We investigate the dynamics of non-interacting particles in a one-dimensional\\ntight-binding chain in the presence of an electric field with random amplitude\\ndrawn from a Gaussian distribution, and explicitly focus on the nature of\\nquantum transport. We derive an exact expression for the probability propagator\\nand the mean-squared displacement in the clean limit and generalize it for the\\ndisordered case using the Liouville operator method. Our analysis reveals that\\nin the presence a random static field, the system follows diffusive transport;\\nhowever, an increase in the field strength causes a suppression in the\\ntransport and thus results in disorder-induced localization. We further extend\\nthe analysis for a time-dependent disordered electric field and show that the\\ndynamics of mean-squared-displacement deviates from the parabolic path as the\\nfield strength increases, unlike the clean limit where ballistic transport\\noccurs.\",\"PeriodicalId\":501066,\"journal\":{\"name\":\"arXiv - PHYS - Disordered Systems and Neural Networks\",\"volume\":\"5 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-08-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - Disordered Systems and Neural Networks\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2408.12653\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Disordered Systems and Neural Networks","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2408.12653","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Quantum transport under oscillatory drive with disordered amplitude
We investigate the dynamics of non-interacting particles in a one-dimensional
tight-binding chain in the presence of an electric field with random amplitude
drawn from a Gaussian distribution, and explicitly focus on the nature of
quantum transport. We derive an exact expression for the probability propagator
and the mean-squared displacement in the clean limit and generalize it for the
disordered case using the Liouville operator method. Our analysis reveals that
in the presence a random static field, the system follows diffusive transport;
however, an increase in the field strength causes a suppression in the
transport and thus results in disorder-induced localization. We further extend
the analysis for a time-dependent disordered electric field and show that the
dynamics of mean-squared-displacement deviates from the parabolic path as the
field strength increases, unlike the clean limit where ballistic transport
occurs.