Autobiography of Yoshitaka Tanimura

Tanimura, Yoshitaka

doi:10.1021/acs.jpcb.1c08552

Cited by 5 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this approach an underdamped HEOM is derived from the multi-component spectral density resulting in a multi-component HEOM. [63] Note that when the vibration is subsumed into the bath, γ 1 introduces additional damping which is not present when the vibration is contained in the Hamiltonian. Approaching the limit γ 1 → 0, the two approaches become equivalent as discussed within ref.…”

Section: B Open System Modelmentioning

confidence: 99%

The role of quantum information in HEOM trajectories

Humphries,

Kinslow,

Green

et al. 2024

Preprint

View full text Add to dashboard Cite

Open quantum systems often operate in the non-Markovian regime where a finite history of a trajectory is intrinsic to its evolution. The degree of non-Markovianity for a trajectory may be measured in terms of the amount of information flowing from the bath back into the system. In this study we consider how information flows through the auxilary density operators (ADOs) in the hierarchical equations of motion (HEOM). We consider three cases for a range of baths,underdamped, intermediate and overdamped. By understanding how information flows, we are able to determine the relative importance of different ADOs within the hierarchy. We show that ADOs sharing a common Matsubara axis behave similarly while ADOs on different Matsubara axes behave differently. Using this knowledge we are able to truncate hierarchies significantly, thus reducing computation time, while obtaining qualitatively similar results. This is illustrated by comparing 2D electronic spectra for a molecule with an underdamped vibration subsumed into the bath spectral density.

show abstract

Section: B Open System Modelmentioning

confidence: 99%

The role of quantum information in HEOM trajectories

Humphries,

Kinslow,

Green

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…This is handled in a consistent manner by the theory of open quantum systems. [ 1,2 ] Open system ideas find use in a wide range of fields ranging from quantum optics, [ 3,4 ] to condensed matter, [ 5,6 ] quantum statistical physics, [ 7–9 ] quantum chemistry, [ 10–12 ] and quantum biology. [ 13 ] In the last decade, its applications to the field of quantum information have seen phenomenal growth.…”

Section: Introductionmentioning

confidence: 99%

Quantum Correlations and Speed Limit of Central Spin Systems

2023

View full text Add to dashboard Cite

In this article, single, and two‐qubit central spin systems interacting with spin baths are considered and their dynamical properties are discussed. The cases of interacting and non‐interacting spin baths are considered and the quantum speed limit (QSL) time of evolution is investigated. The impact of the size of the spin bath on the quantum speed limit for a single qubit central spin model is analyzed. The quantum correlations for (non‐)interacting two central spin qubits are estimated and their dynamical behavior with that of QSL time under various conditions are compared. How QSL time could be availed to analyze the dynamics of quantum correlations is shown.

show abstract

“…The typically computed ZPL and PSB (often called phonon wing) assume Lorentzian shape (which is a consequence of employing nearly Debye spectral density‐like, vide supra ) in the frequency domain. This is also a consequence of exponential dephasing in the time domain, which may be ascribed to a host of factors (e. g., neglecting nonMarkovianity, [38–51] nonCondonicity, [52–60] anharmonicity, [60–78] etc.) when modeling the total Hamiltonian to be used in the time evolution operator.…”

Section: Introductionmentioning

confidence: 99%

Homogeneous Dephasing in Photosynthetic Bacterial Reaction Centers: Time Correlation Function Approach

Toutounji

2023

ChemPhysChem

View full text Add to dashboard Cite

A new tractable linear electronic transition dipole moment time correlation function that accurately accounts for electronic dephasing, asymmetry, and width of 1‐phonon profile, that builds on the homogeneous electronic broadening in Rhodopseudomonas viridis bacterial reaction center is derived. The Fourier transform of this transition moment time correlation function leads to asymmetric multi‐phonon profiles composed of Lorentzian distribution and Gaussian distribution on the high‐ and low‐energy sides, respectively, whereby the overtones widths fold themselves with that of the 1‐phonon profile. This transition moment correlation function also features expedient computation in large systems using the asymmetric phonon profiles to account correctly for dephasing and pigment‐protein interaction (electron‐phonon coupling). Results show a good agreement with the reported literature. The intimate connection between a 1‐phonon profile and the corresponding bath spectral density in photosynthetic complexes is discussed.

show abstract

Autobiography of Yoshitaka Tanimura

Cited by 5 publications

References 22 publications

The role of quantum information in HEOM trajectories

The role of quantum information in HEOM trajectories

Quantum Correlations and Speed Limit of Central Spin Systems

Homogeneous Dephasing in Photosynthetic Bacterial Reaction Centers: Time Correlation Function Approach

Contact Info

Product

Resources

About