Sublinear scaling in non-Markovian open quantum systems simulations

M Cygorek, J Keeling, BW Lovett, EM Gauger - Physical Review X, 2024 - APS
While several numerical techniques are available for predicting the dynamics of non-
Markovian open quantum systems, most struggle with simulations for very long memory and …

[HTML][HTML] ACE: A general-purpose non-Markovian open quantum systems simulation toolkit based on process tensors

M Cygorek, EM Gauger - The Journal of Chemical Physics, 2024 - pubs.aip.org
We describe a general-purpose computational toolkit for simulating open quantum systems,
which provides numerically exact solutions for composites of zero-dimensional quantum …

High-performance colossal permittivity behaviour persists to ultralow temperature in Co+ Ta co-doped SnO2: A spin-defect mediated superstable large electronic …

W Dong, F Tian, Q Ma, D Jiang, SD Seddon… - Acta Materialia, 2021 - Elsevier
Recently, defect complex coupling in nonmagnetic acceptor-donor co-doped binary metal
oxides is found to partially localize the donor electrons with a characteristic defect-dipolar …

Revealing angular momentum transfer channels and timescales in the ultrafast demagnetization process of ferromagnetic semiconductors

Z Chen, JW Luo, LW Wang - Proceedings of the National Academy of …, 2019 - pnas.org
Ultrafast control of magnetic order by light provides a promising realization for spintronic
devices beyond Moore's Law and has stimulated intense research interest in recent years …

Dynamics of the angular momentum in narrow quantum rings with Rashba and Dresselhaus spin-orbit interactions

JM Lia, PI Tamborenea, M Cygorek, VM Axt - Physical Review B, 2022 - APS
The quantum dynamics of the electron's spin and orbital angular momenta in semiconductor
quantum rings is analyzed. Both Rashba and Dresselhaus spin-orbit interactions (SOIs) in …

Quantum kinetic equations for the ultrafast spin dynamics of excitons in diluted magnetic semiconductor quantum wells after optical excitation

F Ungar, M Cygorek, VM Axt - Physical Review B, 2017 - APS
Quantum kinetic equations of motion for the description of the exciton spin dynamics in II-VI
diluted magnetic semiconductor quantum wells with laser driving are derived. The model …

Trend reversal in the magnetic-field dependence of exciton spin-transfer rates in diluted magnetic semiconductors due to non-Markovian dynamics

F Ungar, M Cygorek, VM Axt - Physical Review B, 2018 - APS
We investigate theoretically the influence of an external magnetic field on the spin dynamics
of excitons in diluted magnetic semiconductor quantum wells. To this end, we apply a …

Phonon-induced quantum ratchet in the exciton spin dynamics in diluted magnetic semiconductors in a magnetic field

F Ungar, M Cygorek, VM Axt - Physical Review B, 2019 - APS
Magnetically doped semiconductors are well known for their giant Zeeman splittings which
can reach several meV even in relatively small external magnetic fields. After preparing a …

Optical orientation of acceptor-bound hole magnetic polarons in bulk (Cd, Mn) Te

EA Zhukov, YG Kusrayev, E Kirstein, A Thomann… - Physical Review B, 2019 - APS
The optically induced long-lived spin polarization in the bulk diluted magnetic
semiconductor (Cd, Mn) Te with small manganese concentration is studied by picosecond …

Many-body correlations brought to light in absorption spectra of diluted magnetic semiconductors

F Ungar, M Cygorek, VM Axt - Physical Review B, 2018 - APS
Diluted magnetic semiconductors are materials well known to exhibit strong correlations
which typically manifest in carrier-mediated magnetic ordering. In this Rapid …