Realization of superabsorption by time reversal of superradiance

Yang, Daeho; Oh, Seung-hoon; Han, Jin-Suk; Son, Gibeom; Kim, Jinuk; Kim, Junki; Lee, Moonjoo; An, Kyungwon

doi:10.1038/s41566-021-00770-6

Cited by 32 publications

(15 citation statements)

References 28 publications

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“…A less-studied example is superabsorption ( 11 ), describing the N -dependent enhancement of absorption of radiation by an ensemble of N two-level systems (TLSs). Only very recently has this been demonstrated for a small number of atoms ( 12 ). In principle, superabsorption could have important implications for energy storage and capture technologies, particularly if realized in platforms compatible with energy harvesting, such as organic photovoltaic devices.…”

Section: Introductionmentioning

confidence: 99%

Superabsorption in an organic microcavity: Toward a quantum battery

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Superabsorption in an organic microcavity: Toward a quantum battery

et al. 2022

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“…In fact they showed collective decay twelve orders of magnitude faster than the decay of a single NV − center [31]. Interestingly the reverse process 'superabsorption' also exists -when radiation is absorbed much faster into the ensemble [34], which has been experimentally realized by implementing a time-reversal process of superradiance [34]. This was an extremely interesting observation from an energy transport point of view -combining the two phenomena would allow extremely fast energy transfer.…”

mentioning

confidence: 94%

Reservoir-assisted energy migration through multiple spin-domains

Dias,

Wächtler,

Bastidas

et al. 2021

Preprint

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The transfer of energy through a network of nodes is fundamental to both how nature and current technology operates. Traditionally we think of the nodes in a network being coupled to channels that connect them and then energy is passed from node to channel to node until it reaches its targeted site. Here we introduce an alternate approach to this where our channels are replaced by collective environments (or actually reservoirs) which interact with pairs of nodes. We show how energy initially located at a specific node can arrive at a target node -even though that environment may be at zero temperate. Further we show that such a migration occurs on much faster time scales than the damping rate associated with a single spin coupled to the reservoir. Our approach shows the power of being able to tailor both the system & environment and the symmetries associated with them to provide new directions for future quantum technologies.

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“…Significant research interest has been devoted to the latter set of states, with a variety of proposals aiming to utilize these dark states in order to mitigate radiative losses and therefore improve transport performance [12,[25][26][27][28][29][30]. Bright states, on the other hand, may offer advantages for faster conversion of photonic to electronic energy [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Eliminating radiative losses in long-range exciton transport

Davidson,

Pollock,

Gauger

2022

Preprint

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We demonstrate that it is possible to effectively eliminate radiative losses during excitonic energy transport in systems with an intrinsic energy gradient. By considering chain-like systems of repeating 'unit' cells which can each consist of multiple sites, we show that tuning a single system parameter (the intra-unit-cell coupling) leads to efficient and highly robust transport over relatively long distances. This remarkable transport performance is shown to originate from a partitioning of the system's eigenstates into energetically-separated bright and dark subspaces, allowing long range transport to proceed efficiently through a 'dark chain' of eigenstates. Finally, we discuss the effects of intrinsic dipole moments, which are of particular relevance to molecular architectures, and demonstrate that appropriately-aligned dipoles can lead to additional protection against other (non-radiative) loss processes. Our dimensionless open quantum systems model is designed to be broadly applicable to a range of experimental platforms.

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Realization of superabsorption by time reversal of superradiance

Cited by 32 publications

References 28 publications

Superabsorption in an organic microcavity: Toward a quantum battery

Superabsorption in an organic microcavity: Toward a quantum battery

Reservoir-assisted energy migration through multiple spin-domains

Eliminating radiative losses in long-range exciton transport

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