Chávez Nahum C, Mattiotti Francesco, Méndez-Bermúdez J A, Borgonovi Fausto, Celardo G Luca
Dipartimento di Matematica e Fisica and Interdisciplinary Laboratories for Advanced Materials Physics, Università Cattolica, via Musei 41, 25121 Brescia, Italy.
Benemérita Universidad Autónoma de Puebla, Apartado Postal J-48, Instituto de Física, 72570, Mexico.
Phys Rev Lett. 2021 Apr 16;126(15):153201. doi: 10.1103/PhysRevLett.126.153201.
Overcoming the detrimental effect of disorder at the nanoscale is very hard since disorder induces localization and an exponential suppression of transport efficiency. Here we unveil novel and robust quantum transport regimes achievable in nanosystems by exploiting long-range hopping. We demonstrate that in a 1D disordered nanostructure in the presence of long-range hopping, transport efficiency, after decreasing exponentially with disorder at first, is then enhanced by disorder [disorder-enhanced transport (DET) regime] until, counterintuitively, it reaches a disorder-independent transport (DIT) regime, persisting over several orders of disorder magnitude in realistic systems. To enlighten the relevance of our results, we demonstrate that an ensemble of emitters in a cavity can be described by an effective long-range Hamiltonian. The specific case of a disordered molecular wire placed in an optical cavity is discussed, showing that the DIT and DET regimes can be reached with state-of-the-art experimental setups.
克服纳米尺度无序的有害影响非常困难，因为无序会导致局域化并使传输效率呈指数级抑制。在此，我们揭示了通过利用长程跳跃在纳米系统中可实现的新型且稳健的量子传输机制。我们证明，在存在长程跳跃的一维无序纳米结构中，传输效率起初随无序呈指数下降，随后因无序而增强（无序增强传输（DET）机制），直到出现违反直觉的情况，即达到与无序无关的传输（DIT）机制，并在实际系统中跨越几个数量级的无序程度持续存在。为阐明我们结果的相关性，我们证明腔中的一组发射器可以用有效的长程哈密顿量来描述。讨论了置于光学腔中的无序分子线的具体情况，表明利用当前最先进的实验装置可以实现DIT和DET机制。
