Long-Range Non-Equilibrium Coherent Tunneling Induced by Fractional Vibronic Resonances
| Autor: | R. Kevin Kessing, Pei-Yun Yang, Salvatore R. Manmana, Jianshu Cao |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Chemical Physics (physics.chem-ph)
Condensed Matter - Other Condensed Matter Quantum Physics Quantum Gases (cond-mat.quant-gas) Physics - Chemical Physics FOS: Physical sciences General Materials Science Physical and Theoretical Chemistry Quantum Physics (quant-ph) Condensed Matter - Quantum Gases Other Condensed Matter (cond-mat.other) |
| Popis: | We study the influence of a linear energy bias on a non-equilibrium excitation on a chain of molecules coupled to local phonons (a tilted Holstein model) using both a random-walk rate kernel theory and a nonperturbative, massively parallelized adaptive-basis algorithm. We uncover structured and discrete vibronic resonance behavior fundamentally different from both linear response theory and homogeneous polaron dynamics. Remarkably, resonance between the phonon energy $\hbar\omega$ and the bias $\delta_\epsilon$ occurs not only at integer but also fractional ratios $\delta_\epsilon/(\hbar\omega) = \frac{m}{n}$, which effect long-range $n$-bond $m$-phonon tunneling. These observations are also reproduced in a model calculation of a recently demonstrated Cy3 system. Potential applications range from molecular electronics to optical lattices and artificial light harvesting via vibronic engineering of coherent quantum transport. Comment: Added results on Cy3 model system and streamlined presentation |
| Databáze: | OpenAIRE |
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