Energy transfer in $N$-component nanosystems enhanced by pulse-driven vibronic many-body entanglement

• URL: http://arxiv.org/abs/1708.03624v2
• Date: Fri, 17 Nov 2023 09:38:55 GMT
• Title: Energy transfer in $N$-component nanosystems enhanced by pulse-driven vibronic many-body entanglement
• Authors: Fernando J. G\'omez-Ruiz, Oscar L. Acevedo, Ferney J. Rodr\'iguez, Luis Quiroga and Neil F. Johnson
• Abstract summary: We show that pulses of intermediate duration generate highly entangled vibronic states that spread multiple excitons -- and hence energy -- maximally within the system. The underlying pulse-generated vibronic entanglement increases in strength and robustness as $N$ increases.
• Score: 41.94295877935867
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The processing of energy by transfer and redistribution plays a key role in the evolution of dynamical systems. At the ultrasmall and ultrafast scale of nanosystems, quantum coherence could in principle also play a role and has been reported in many pulse-driven nanosystems (e.g. quantum dots and even the microscopic Light-Harvesting Complex II (LHC-II) aggregate). Typical theoretical analyses cannot easily be scaled to describe these general $N$-component nanosystems; they do not treat the pulse dynamically; and they approximate memory effects. Here our aim is to shed light on what new physics might arise beyond these approximations. We adopt a purposely minimal model such that the time-dependence of the pulse is included explicitly in the Hamiltonian. This simple model generates complex dynamics: specifically, pulses of intermediate duration generate highly entangled vibronic (i.e. electronic-vibrational) states that spread multiple excitons -- and hence energy -- maximally within the system. Subsequent pulses can then act on such entangled states to efficiently channel subsequent energy capture. The underlying pulse-generated vibronic entanglement increases in strength and robustness as $N$ increases.

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