Dynamics and quantumness of excitation energy transfer through a complex quantum network

Qin, M.; Shen, H. Z.; Zhao, Xunwang

doi:10.1103/physreve.90.042140

Cited by 7 publications

(5 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this article, we have ignored decoherence, for example caused by intramolecular vibrations, although decoherence and vibrations frequently play a crucial role in transport [49][50][51][52][53][54][55][56][57][58] .…”

Section: Discussionmentioning

confidence: 99%

Excitation transport in molecular aggregates with thermal motion

R.Pant

Wüster

2020

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Excitation transport in molecular aggregates with thermal motion

R.Pant

Wüster

2020

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Therein, efficient light harvesting process, which delivers the captured photon energy to the reaction center, plays a crucial role in natural photosynthesis [1][2][3][4]. Because a series of experimental and theoretical explorations [5][6][7][8][9] have demonstrated that quantum coherent phenomena might exist and even optimize the natural photosynthesis, much effort has been made to reveal the effect of quantum coherence on efficient light harvesting [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Artificial light harvesting by dimerized Möbius ring

Gong

Tao

et al. 2018

Phys. Rev. E

View full text Add to dashboard Cite

We theoretically study artificial light harvesting by a Möbius ring. When the donors in the ring are dimerized, the energies of the donor ring are split into two subbands. Because of the nontrivial Möbius boundary condition, both the photon and acceptor are coupled to all collective-excitation modes in the donor ring. Therefore, the quantum dynamics in the light harvesting is subtly influenced by dimerization in the Möbius ring. It is discovered that energy transfer is more efficient in a dimerized ring than that in an equally spaced ring. This discovery is also confirmed by a calculation with the perturbation theory, which is equivalent to the Wigner-Weisskopf approximation. Our findings may be beneficial to the optimal design of artificial light harvesting.

show abstract

“…Previous studies on environment-assisted quantum transport (ENAQT) in pigment-protein molecular aggregates [7][8][9][10][11][12][13][14][15][16][17][18][19] have, among others, proposed the following mechanisms for an enhanced EET efficiency:…”

Section: Discussionmentioning

confidence: 99%

“…Photosynthetic complexes are known to convert excitation energy to chemical energy with high efficiency [6] which has created an interest in studying their properties and trying to mimic their features in artificial photosynthesistechnology. It is believed that quantum coherence together with environmental effects enables such an efficient excitation energy transfer (EET) among the pigments in the network and many studies have tried to reveal how quantum coherence, different environmental interactions and EET efficiency are related to each other [7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Environmental design principles for efficient excitation energy transfer in dimer and trimer pigment-protein molecular aggregates and the relation to non-Markovianity

Bengtson,

Sahlin,

Ericsson

2018

Preprint

View full text Add to dashboard Cite

Lately there has been an interest in studying the effects and mechanisms of environment-assisted quantum transport, especially in the context of excitation energy transfer (EET) in pigment-protein molecular aggregates. Since these systems can be seen as open quantum systems where the dynamics is within the non-Markovian regime, the effect of non-Markovianity on efficient EET as well as its role in preserving quantum coherence and correlations has also been investigated in recent works. In this study, we explore optimal environments for efficient EET between end sites in a number of dimer and trimer model pigment-protein molecular aggregates when the EET dynamics is modeled by the HEOM-method. For these optimal environmental parameters, we further quantify the non-Markovianity by the BLP-measure to elucidate its possible connection to efficient EET. We also quantify coherence in the pigment systems by means of the measure l1−norm of coherence to analyze its interplay with environmental effects when EET efficiency is maximal. Our aim is to investigate possible environmental design principles for achieving efficient EET in model pigmentprotein molecular aggregates and to determine whether non-Markovianity is a possible underlying resource in such systems. We find that the structure of the system Hamiltonian (i.e., the pigment Hamiltonian parameter space) and especially, the relationship between the site excitation energies, determines whether one of two specific environmental regimes is the most beneficial in promoting efficient EET in these model systems. In the first regime, optimal environmental conditions are such that the EET dynamics in the system is left as coherent as possible. In the second regime, the most advantageous role of the environment is to drive the system towards equilibrium as fast as possible. In reality, optimal environmental conditions may involve a combination of these two effects. We cannot establish a relation between efficient EET and non-Markovianity, i.e., non-Markovianity cannot be regarded as a resource in the systems investigated in this study.

show abstract

Dynamics and quantumness of excitation energy transfer through a complex quantum network

Cited by 7 publications

References 63 publications

Excitation transport in molecular aggregates with thermal motion

Excitation transport in molecular aggregates with thermal motion

Artificial light harvesting by dimerized Möbius ring

Environmental design principles for efficient excitation energy transfer in dimer and trimer pigment-protein molecular aggregates and the relation to non-Markovianity

Contact Info

Product

Resources

About