{"title":"Improved selection of dark states in the presence of drive-induced dissipation","authors":"Arpan Chatterjee, Rangeet Bhattacharyya","doi":"10.1140/epjd/s10053-024-00839-1","DOIUrl":null,"url":null,"abstract":"<p>We revisit the coherent population trapping (CPT) of a three-state system in the presence of environmental fluctuations and strong electromagnetic driving fields. To this end, we use a fluctuation-regulated quantum master equation that considers the drive-induced dissipation (DID) in the system. The DID originates from the combined effect of a driving field and environmental fluctuations. We report that increasing DID shows a narrowing of CPT linewidth and, hence, improved selection of the dark states. As such, the DID enhances the sensitivity of CPT at a driving strength much larger than the system’s relaxation rates. We also discuss the practical implementation of the scheme along with possible applications.</p><p>The figure shows the narrowing of CPT responance (narrow dark region) as the environmental fluctuation correlation <span>\\(\\tau _c\\)</span> and hence, the drive-induced dissipation increases.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 4","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The European Physical Journal D","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1140/epjd/s10053-024-00839-1","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
We revisit the coherent population trapping (CPT) of a three-state system in the presence of environmental fluctuations and strong electromagnetic driving fields. To this end, we use a fluctuation-regulated quantum master equation that considers the drive-induced dissipation (DID) in the system. The DID originates from the combined effect of a driving field and environmental fluctuations. We report that increasing DID shows a narrowing of CPT linewidth and, hence, improved selection of the dark states. As such, the DID enhances the sensitivity of CPT at a driving strength much larger than the system’s relaxation rates. We also discuss the practical implementation of the scheme along with possible applications.
The figure shows the narrowing of CPT responance (narrow dark region) as the environmental fluctuation correlation \(\tau _c\) and hence, the drive-induced dissipation increases.
期刊介绍：
The European Physical Journal D (EPJ D) presents new and original research results in:
Atomic Physics;
Molecular Physics and Chemical Physics;
Atomic and Molecular Collisions;
Clusters and Nanostructures;
Plasma Physics;
Laser Cooling and Quantum Gas;
Nonlinear Dynamics;
Optical Physics;
Quantum Optics and Quantum Information;
Ultraintense and Ultrashort Laser Fields.
The range of topics covered in these areas is extensive, from Molecular Interaction and Reactivity to Spectroscopy and Thermodynamics of Clusters, from Atomic Optics to Bose-Einstein Condensation to Femtochemistry.
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