Results 131 to 140 of about 5,233,673 (285)

Generalization of Gisin’s theorem to quantum fields

open access: yesNew Journal of Physics
We generalize Gisin’s theorem on the relation between the entanglement of pure states and Bell non-classicality to the case of mode entanglement of separated groups of modes of quantum fields extending the theorem to cover also states with undefined ...
Konrad Schlichtholz, Marcin Markiewicz
doaj   +1 more source

Structure of light-front vacuum sector diagrams

open access: yesPhysics Letters B, 2019
We study the structure of scalar field light-front quantization vacuum graphs. In instant-time quantization both non-vacuum and vacuum graphs can equivalently be described by either the off-shell four-dimensional Feynman diagram approach or the on-shell ...
Philip D. Mannheim   +2 more
doaj   +1 more source

Bond and Antibond Resonances: A Unified Framework for Singlet Biradical Character

open access: yesChemistry – A European Journal, Volume 32, Issue 23, 16 June 2026.
The electronic structure of a variety of singlet biradicaloids may be described in the Lewis picture using single antibonds as the central bonding motif. In conjunction with a consistent set of biradical indicators, we can resolve some long‐standing disputes over the biradical character of molecules such as O3 and S2N2.
Daniel T. Gschwind, Jonas Bresien
wiley   +1 more source

Gravitational Scattering Amplitudes and Closed String Field Theory in the Proper-Time Gauge

open access: yesEPJ Web of Conferences, 2018
We construct a covariant closed string field theory by extending recent works on the covariant open string field theory in the proper-time gauge. Rewriting the string scattering amplitudes generated by the closed string field theory in terms of the ...
Lee Taejin
doaj   +1 more source

Jahn–Teller Distortions in Pseudo‐Octahedral Low‐Spin Ni(III) Complexes With O,O or N,N Bidentate Ligands: A DFT Study

open access: yesJournal of Computational Chemistry, Volume 47, Issue 16, 15 June 2026.
DFT analysis of d7 pseudo‐octahedral Ni(III) complexes reveals Jahn–Teller elongation (ΔR ≈ 0.15–0.23 Å) analogous to d9 Cu(II) systems. Elongated structures are minima, while compressed geometries are saddle points with small stabilization energies (ΔEJT ≈ 0.02–0.04 eV).
Jeanet Conradie
wiley   +1 more source

Quantum computational logics and Fock space semantics

open access: yes, 2005
The theory of logical gates in quantum computation has suggested new forms of quantum logic, called quantum computational logics. The basic semantic idea is the following: the meaning of a sentence is identified with a quantum information quantity ...
Leporini, Roberto
core   +2 more sources

Teleportation of a qubit using quasi-Bell states

open access: yesJournal of Physics Communications
In this paper, we study the exotic Landau problem at the classical level where two conserved quantities are derived. At the quantum level, the corresponding quantum operators of the conserved quantities provide two oscillator representations from which ...
Isiaka Aremua, Laure Gouba
doaj   +1 more source

2×2 operator matrix with real parameter and its spectrum [PDF]

open access: yesE3S Web of Conferences
In the present paper we consider a linear bounded self-adjoint 2×2 block operator matrix Aμ (so called generalized Friedrichs model) with real parameter μ ∈ R.
Dilmurodov Elyor B.   +4 more
doaj   +1 more source

Transferable Semiempirical Models for Judd–Ofelt Parameters and Multiphonon Relaxation in Eu3+ Complexes: Toward an Experiment‐Free Luminescence Design

open access: yesJournal of Computational Chemistry, Volume 47, Issue 16, 15 June 2026.
ABSTRACT The rational design of lanthanide‐based luminescent systems using purely theoretical approaches remains challenging due to the reliance of existing models on experimental data. Herein, we propose a theoretical protocol for the design of new Eu3+ based luminescent systems, starting from a previously synthesized and experimentally characterized ...
Claudio M. B. Neto   +5 more
wiley   +1 more source

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