Fermi's golden rule (FGR) serves as the basis for many expressions of spectroscopic observables and quantum transition rates. The utility of FGR has been demonstrated through decades of experimental confirmation. However, there still remain important cases where the evaluation of a FGR rate is ambiguous or ill-defined. Examples are cases where the rate has divergent terms due to the sparsity in the density of final states or time dependent fluctuations of system Hamiltonians. Strictly speaking, assumptions of FGR are no longer valid for such cases. However, it is still possible to define modified FGR rate expressions that are useful as effective rates. The resulting modified FGR rate expressions resolve a long standing ambiguity often encountered in using FGR and offer more reliable ways to model general rate processes. Simple model calculations illustrate the utility and implications of new rate expressions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/5.0152804 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Brief communication: virological outcomes and dolutegravir resistance mutations in HIV-infected patients: a multicenter retrospective cohort study in Mozambique.
AIDS Res Ther
January 2025
Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy.
The global HIV epidemic remains a major public health challenge, with DTG playing a key role in ART regimens due to its efficacy and tolerability. This study evaluated virological outcomes and resistance mutations in patients on DTG in Mozambique through a retrospective cohort study in seven DREAM centers. Data from 29,601 patients (98.
View Article and Find Full Text PDFLow-exhaustion peripheral circulating γδ T cells serve as a biomarker for predicting the clinical benefit rate of non-small cell lung cancer (NSCLC) patients to chemotherapy or targeted therapy: a single-center retrospective study.
BMC Cancer
January 2025
Guangdong Provincial Key Laboratory of Tumor Interventional Diagnosis and Treatment, Zhuhai Institute of Translational Medicine, Zhuhai People's Hospital Affiliated with Jinan University, Jinan University, Zhuhai, China.
Background: Multiple studies have demonstrated that the abundance and functionality of γδ T cells are favorable prognostic indicators for prolonged survival in cancer patients. However, the association between the immunophenotype of circulating γδ T cells and the therapeutic response in NSCLC patients undergoing chemotherapy or targeted therapy remains unclear.
Methods: Patients with EGFR wild-type (EGFR-WT) or mutant (EGFR-Mut) non-small cell lung cancer (NSCLC), diagnosed between January 2020 and January 2024, were included in this study.
Differences and driving factors of leaf functional traits between old tree and mature tree of Pinus tabulaeformis in the Loess Plateau.
BMC Plant Biol
January 2025
Key Comprehensive Laboratory of Forestry, Northwest A&F University, Yangling, Shaanxi Province, 712100, P. R. China.
Background: Study the leaf functional traits is highly important for understanding the survival strategies and climate adaptability of old trees. In this study, the old (over 100 years old) and mature trees (about 50 years old) of Pinus tabulaeformis in the Loess Plateau were studied, and the variation of 18 leaf functional traits (6 economic, 4 anatomical, 2 photosynthetic and 6 physiological traits) was analyzed to understand the differences of survival strategies between old and mature trees. Combined with transcriptome and simple sequence repeats (SSR) techniques, the effects of soil property factors and genetic factors on leaf functional traits and the potential molecular mechanisms of traits differences were studied.
View Article and Find Full Text PDFLoss of ARID1A accelerates prostate tumourigenesis with a proliferative collagen-poor phenotype through co-operation with AP1 subunit cFos.
Br J Cancer
January 2025
School of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1QH, UK.
Background: Prostate cancer (PC) is the commonest male visceral cancer, and second leading cause of cancer mortality in men in the Western world.
Methods: Using a forward-mutagenesis Sleeping Beauty (SB) transposon-based screen in a Probasin Cre-Recombinase (Pb-Cre) Pten-deficient mouse model of PC, we identified Arid1a loss as a driver in the development of metastatic disease.
Results: The insertion of transposon in the Arid1a gene resulted in a 60% reduction of Arid1a expression, and reduced tumour free survival (SB:Pten Arid1a median 226 days vs SB:Pten Arid1a 293 days, p = 0.
Effects of fluconazole and amphotericin B in the control of cryptococcal pneumonia in vivo.
AMB Express
January 2025
Department of Respiratory and Critical Care, Haining Branch, The First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China.
Cryptococcal pneumonia is a severe fungal infection of the respiratory system, predominantly caused by Cryptococcus neoformans. Its incidence is increasing, driven by evolving pathogen dynamics and heightened susceptibility among patient populations. This investigation aimed to assess the combined therapeutic efficacy of Fluconazole and Amphotericin B for cryptococcal pneumonia and to explore the roles of miR-15b and TGF-β1 in modulating treatment response.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!