Results 141 to 150 of about 48,835 (257)

Improvement and Analytic Techniques in Hamiltonian Lattice Gauge Theory

, 2003
PhD ...
openaire   +2 more sources

Electronic Correlation Effects in the Response of Graphene and MoS2 Monolayers to the Impact of Highly‐Charged Ions

physica status solidi (b), EarlyView.
The response of graphene and MoS2 monolayers to highly‐charged impinging ions is investigated using nonequilibrium Green functions theory. Electronic correlations are found to have a significantly stronger influence on the ultrafast ion‐induced electron dynamics in MoS2 than in graphene.
Giorgio Lovato, Michael Bonitz, Karsten Balzer, Fabio Caruso, Jan‐Philip Joost   +4 more
wiley   +1 more source

An Extended Hückel Theory Parameter Set for Efficient Electronic Structure Calculations of SiGe Alloys

physica status solidi (RRL) – Rapid Research Letters, EarlyView.
A new parameterization of Si and Ge in the framework of the extended Hückel theory is presented. Bandgap and effective mass are calculated for unstrained and biaxially strained SiGe alloys. In SiGeC alloys with C atoms in close proximity, additional bands are observed, which are related to defect states in real crystals.
Daniel Dick, Florian Fuchs, Jörg Schuster, Sibylle Gemming   +3 more
wiley   +1 more source

Simulating (2+1)D SU(2) Yang-Mills lattice gauge theory at finite density with tensor networks

Physical Review Research
We numerically simulate a non-Abelian lattice gauge theory in two spatial dimensions, with tensor networks (TN), up to intermediate sizes (>30 matter sites) well beyond exact diagonalization.
Giovanni Cataldi, Giuseppe Magnifico, Pietro Silvi, Simone Montangero   +3 more
doaj   +1 more source

Quantum Iterative Methods for Solving Differential Equations with Application to Computational Fluid Dynamics

Advanced Quantum Technologies, EarlyView.
Quantum algorithms for differential equations are developed with applications in computational fluid dynamics. The methods follow an iterative simulation framework, implementing Jacobi and Gauss–Seidel schemes on quantum registers through linear combinations of unitaries.
Chelsea A. Williams, Antonio A. Gentile, Vincent E. Elfving, Daniel Berger, Oleksandr Kyriienko   +4 more
wiley   +1 more source

The Smearing of Quasi‐Particles: Signatures in the Entanglement Entropy of Excited Many‐Particle Systems

Advanced Quantum Technologies, EarlyView.
Entanglement reveals hidden structure in quantum matter. We explore how quasi‐particles shape the crossover from area‐law to volume‐law entanglement, using models from spinless fermions to SYK. Our results show a striking linear growth of entanglement with energy, explained as a hallmark of quasi‐particles, offering new insight into the entanglement ...
Jagannath Sutradhar, Jonathan Ruhman, Avraham Klein, Dimitri Gutman, Richard Berkovits   +4 more
wiley   +1 more source

Digital Twin Simulations Toolbox of the Nitrogen‐Vacancy Center in Diamond

Advanced Quantum Technologies, EarlyView.
The Nitrogen‐vacancy (NV) center in diamond is a key platform within quantum technologies. This work introduces a Python based digital‐twin of the NV, where the spin dynamics of the system is simulated without relying on commonly used approximations, such as the adoption of rotating frame. The digital‐twin is validated through three different examples,
Lucas Tsunaki, Anmol Singh, Sergei Trofimov, Boris Naydenov   +3 more
wiley   +1 more source

Quantum simulation of the one-dimensional Fermi-Hubbard model as a Z_{2} lattice-gauge theory

Physical Review Research
The Fermi-Hubbard model is one of the central paradigms in the physics of strongly correlated quantum many-body systems. Here we propose a quantum circuit algorithm based on the Z_{2} lattice gauge theory (LGT) representation of the one-dimensional Fermi-
Uliana E. Khodaeva, Dmitry L. Kovrizhin, Johannes Knolle   +2 more
doaj   +1 more source

Uncovering Exotic Topological Quantum States in Pure and Magnetically‐Doped Pyrite OsS2

Advanced Quantum Technologies, EarlyView.
Pyrite‐structured OsS2 is identified as a fragile topological insulator with an unprecedented 602 meV bandgap, featuring helical surface states and van Hove singularities amenable to ARPES verification. Magnetic doping with Pd, Fe, Ni, or Co induces phase transitions to strong topological insulators, semimetals, 3D quantum anomalous Hall insulators ...
Ali Sufyan, Hasan M. Abdullah, Gustav Johansson, Alexander C. Tyner, Hafiz Adil Qayyum, Ghulam Abbas Gilani, Rovi Angelo B. Villaos, Zhi‐Quan Huang, Feng‐Chuan Chuang, J. Andreas Larsson   +9 more
wiley   +1 more source

Band Edge Reorganization via Symmetry Constraints in Covalent Bonding Heterojunctions Boosts Photocatalytic Metronidazole Degradation

Rare Metals, EarlyView.
ABSTRACT The covalent bonds at heterojunction interfaces enable more efficient charge carrier separation than traditional weakly coupled heterojunctions, with enhanced photocatalytic performance for organic wastewater purification. The interfacial covalent bonds drive energy band reorganization, rendering the conventional independent band edge ...
Jing‐Yu Ren, Ying Hua, Xin‐Yi Yang, Shuai Wang, Zhi‐Rui Niu, Yan‐Zhong Zhen   +5 more
wiley   +1 more source