Results 141 to 150 of about 2,222 (252)

Collective theory at finite-N: reduction of the emergent Hilbert space

Journal of High Energy Physics
Continuing the formulation of finite N Hilbert spaces in emergent theories we study in this work S N symmetric collective models. For the case of N bosons in d dimensions, which map to matrix models with commuting matrices, we describe a complete ...
Robert de Mello Koch, Antal Jevicki, Garreth Kemp, Anik Rudra   +3 more
doaj   +1 more source

Efficient Machine Learning Barrier Height and Reaction Enthalpy Corrections for Low‐ and Midlevel Quantum Mechanical Calculations

Small Structures, Volume 7, Issue 6, June 2026.
This work provides Δ‐machine learning corrections to barrier heights and reaction enthalpies for low‐ and midlevel electronic structure methods (PM6, HF/3‐21G, and r2SCAN‐3c in this study). The r2SCAN‐3c method, together with our Δ‐ML corrections, shows excellent performance, achieving coupled cluster accuracy in most of the datasets considered here ...
Omar Rodríguez‐López, Emilio Martínez‐Núñez, Saulo A. Vázquez, Berta Fernández   +3 more
wiley   +1 more source

Sampling constants in generalized Fock spaces

, 2023
We prove several results related to a Logvinenko-Sereda type theorem on dominating sets for generalized doubling Fock spaces. In particular, we give a precise polynomial dependence of the sampling constant on the relative density parameter $\gamma$ of ...
Konate, S, Orsoni, Marcu-Antone
core  

Re‐refinement of the structure of the planar hexagonal phase of ZnO nanocrystals

Acta Crystallographica Section B, Volume 82, Issue 3, Page 310-315, June 2026.
The planar hexagonal phase of ZnO is significant for understanding ferroelectricity in this class of materials, and it is well established for ZnO in layered systems. Previously it has been reported as freestanding nanocrystals, but the fitted unit‐cell parameters differed from predictions by up to 16%; we resolve this anomaly to provide fundamental ...
Musen Li, Lingyao Zhang, Wei Ren, Jeffrey R. Reimers   +3 more
wiley   +1 more source

SAMPLING CONSTANTS IN GENERALIZED FOCK SPACES

, 2021
We prove several results related to a Logvinenko-Sereda type theorem on dominating sets for generalized doubling Fock spaces. In particular, we give a precise polynomial dependence of the sampling constant on the relative density parameter $\gamma$ of ...
ORSONI, Marcu-Antone, KONATE, S
core  

Silicon allotropes by large‐volume high‐pressure techniques: crystal growth mechanisms, phase diagrams and hexagonal nanostructured Si‐6H by in situ X‐ray diffraction and computational methods

Acta Crystallographica Section B, Volume 82, Issue 3, Page 280-298, June 2026.
In situ X‐ray diffraction is used for exploring Si crystallography and for studying phase‐transformation mechanisms in elemental Si and Na–Si systems. We present original results of hexagonal silicon, Si‐6H and a critical analysis of the past‐decade discoveries of silicon Si‐4H and Si24 using large‐volume high‐pressure techniques.Metastable allotropes ...
Alexandre Courac, Yann Le Godec
wiley   +1 more source

Correction Scheme for Molecular Total Energies From Quantum Phase Estimation Under Limited Qubit Resources

Journal of Computational Chemistry, Volume 47, Issue 14, 30 May 2026.
We propose a hybrid quantum and classical method for accurately evaluating molecular total energies with limited logical qubits. In our subspace dynamic correlation (SDC) method, electron correlation involving core and external orbitals that are not encoded on the quantum computer is recovered using an approximate wavefunction reconstructed on ...
Nobuki Inoue, Hisao Nakamura
wiley   +1 more source

On a higher level extension of Leclerc–Thibon product theorem in q-deformed Fock spaces

, 2012
The q-deformed Fock spaces of higher levels were introduced by Jimbo–Misra–Miwa–Okado. Uglov defined a canonical bases in q-deformed Fock spaces of higher levels. Leclerc–Thibon showed a product theorem in q-deformed Fock spaces of level one. The product
Iijima, Kazuto
core   +1 more source

Free Fermi and Bose Fields in TQFT and GBF

Symmetry, Integrability and Geometry: Methods and Applications, 2013
We present a rigorous and functorial quantization scheme for linear fermionic and bosonic field theory targeting the topological quantum field theory (TQFT) that is part of the general boundary formulation (GBF).
Robert Oeckl
doaj   +1 more source

Computational Design of Zinc Single‐Atom Catalysts in Lantern Organic Framework

Journal of Computational Chemistry, Volume 47, Issue 14, 30 May 2026.
We present a DFT study of zinc‐embedded Lantern Organic Frameworks (Zn@LOFs), revealing that sp3‐bridged structures favor thermodynamically stable endo‐configuration, while sp‐bridged structures enable kinetically trapped exo‐configuration, both potentially suppressing ZnZn agglomeration. Beyond structural stability, Zn@LOFs exhibit tunable electronic
Lam H. Nguyen, Thanh N. Truong
wiley   +1 more source