Results 161 to 170 of about 283,223 (248)

Excitonic Theory of the Ultrafast Optical Response of 2D‐Quantum‐Confined Semiconductors at Elevated Densities

Advanced Quantum Technologies, Volume 9, Issue 6, June 2026.
In this work, an excitonic many‐body theory for the ultrafast optical response at elevated excitation densities for Wannier–Mott excitons is developed and applied to two distinct materials (GaAs quantum well and MoSe2 monolayer) as proponents of two different Coulomb‐interaction regimes.
Henry Mittenzwey, Oliver Voigt, Andreas Knorr   +2 more
wiley   +1 more source

Dynamical role of system-environment correlations in non-Markovian dynamics

, 2012
We analyze the role played by system-environment correlations in the emergence of non-Markovian dynamics. By working within the framework developed in Breuer et al. [Phys. Rev. Lett.
Modi, K., Paternostro, M., Mazzola, L., Modi, Kavan, Paternostro, Mauro, Rodríguez-Rosario, C.A., Rodríguez-Rosario, César A., Mazzola, Laura   +7 more
core   +1 more source

Preserving Quantum Coherence in Thermal Noisy Systems Via Qubit Frequency Modulation

Advanced Quantum Technologies, Volume 9, Issue 6, June 2026.
Frequency modulation is shown to preserve quantum coherence in a thermal phase‐covariant environment only under specific noise conditions. It protects a qubit against thermal dissipation from a Lorentzian reservoir, but fails against thermal pure dephasing from an Ohmic reservoir.
Mahshid Khazaei Shadfar, Farzam Nosrati, Ali Mortezapour, Vincenzo Macri, Roberto Morandotti, Rosario Lo Franco   +5 more
wiley   +1 more source

Temporal Ontology and Non-Markovian Quantum Dynamics

Philosophies
Recent arguments in favor of Presentism leverage Markovianity, the principle of the future’s events being able to be determined/influenced only by current events (and sufficiently near events).
Hong Joo Ryoo
doaj   +1 more source

Rational acquisition of laboratory equipment: an accurate mathematical model to estimate the trade‐offs in shared and nonshared equipment

Acta Crystallographica Section D, Volume 82, Issue 6, Page 638-645, June 2026.
We present a quantitative framework combining cost modelling and queueing theory to estimate hourly access costs, waiting times and congestion levels for shared high‐end scientific equipment. The approach is general, illustrated with cryo‐electron microscopy examples, and implemented in an open‐access online calculator to support evidence‐based ...
C. O. S. Sorzano, J. M. Carazo
wiley   +1 more source

Discrete time crystals in the presence of non-Markovian dynamics

We study discrete time crystals (DTCs) in periodically driven quantum systems, in the presence of non-Markovian dissipation. In contrast to DTCs observed in earlier works in the presence of Markovian dynamics, using the open Dicke model in presence of ...
Das, Bandita, Jaseem, Noufal, Mukherjee, Victor   +2 more
core   +1 more source

Non-Markovian dynamics for bipartite systems

, 2008
We analyze the appearance of non-Markovian effects in the dynamics of a bipartite system coupled to a reservoir, which can be described within a class of non-Markovian equations given by a generalized Lindblad structure. A novel master equation, which we
B. Vacchini
core   +1 more source

No safe refuge? Contrasting effects of hunting on rainforest mammal persistence and (re)colonisation

Journal of Applied Ecology, Volume 63, Issue 6, June 2026.
Our results imply that hunting not only targets areas used as refuges by wildlife, but also reduces recolonisation potential and may therefore alter source–sink dynamics. We recommend spatially targeted community‐led actions to limit hunting where wildlife still persists through the creation of no‐hunting areas to ensure the long‐term persistence of ...
Vianny R. V. Nguimdo, Mathias W. Tobler, Ekwoge E. Abwe, Marcel E. Ketchen, Nelson E. Betobe, Bethan J. Morgan, Johannes Kamp, Mahmood Soofi, Matthias Waltert   +8 more
wiley   +1 more source

Extending Geometric Brownian Motion for Modeling Monthly Streamflow Under Brown Noise Dominance Over Other Colored Noises

JAWRA Journal of the American Water Resources Association, Volume 62, Issue 3, June 2026.
ABSTRACT Noise is an inherent component of observed time series and may be treated either as an undesirable disturbance or as an intrinsic system characteristic containing information about underlying dynamics. In the latter perspective, noise behavior must be analyzed and quantified, and the model used for time‐series synthesis should be compatible ...
Shirin Studnicka, Deli Li, Umed Panu
wiley   +1 more source

Non-Markovian dynamics of open quantum systems [PDF]

, 2016
This thesis is centred around the striking phenomenon of non-Markovianity which emanates from exact dynamical descriptions of open quantum systems. Non- Markovianity is associated with the existence of memory effects in the environment and leads to a ...
Addis, Carole
core