2009/06/30 by Ahsan Nazir · 1 citation
Computer Science · Physics and Astronomy · #Nonlinear Dynamics and Pattern Formation #Quantum, superfluid, helium dynamics #Spectroscopy and Quantum Chemical Studies #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevlett.103.146404
published as Phys. Rev. Lett. 103, 146404 (2009) · 5 pages, 1 figure, 2 page supplement. Published version. Figure edited, section added on experimental relevance, reference added, various minor changes to the text. Comments welcome
openalex publication_date 2009/10/01 · arxiv created 2009/10/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
I investigate energy transfer in a donor-acceptor pair beyond weak system-bath coupling. I identify a transition from coherent to incoherent dynamics with increasing temperature, due to multiphonon effects not captured by a standard weak-coupling treatment. The crossover temperature has a marked dependence on the degree of spatial correlation between fluctuations experienced at the two system sites. For strong correlations, this leads to the possibility of coherence surviving into a high-temperature regime.