Results 21 to 30 of about 1,520,902 (172)

Relativistic Wigner Function for Quantum Walks

, 2019
International audienceA relativistic Wigner function for free Discrete Time Quantum Walks (DTQWs) on the square $2D$ space-time lattice is defined. Useful concepts such as discrete derivatives and discrete distributions are also introduced. The transport
Debbasch, Fabrice
core   +6 more sources

WIGNER DISTRIBUTIONS AND QUARK ORBITAL ANGULAR MOMENTUM [PDF]

, 2012
We discuss the quark phase-space or Wigner distributions of the nucleon which combine in a single picture all the information contained in the generalized parton distributions and the transverse-momentum dependent parton distributions.
CÉDRIC LORCÉ, PASQUINI, BARBARA
core   +1 more source

Discrete Wigner distribution for two qubits: a characterization of entanglement properties [PDF]

Journal of Physics A: Mathematical and General, 2006
We study the properties of the discrete Wigner distribution for two qubits introduced by Wotters. In particular, we analyze the entanglement properties within the Wigner distribution picture by considering the negativity of the Wigner function (WF) and the correlations of the marginal distribution.
Franco R., PENNA, Vittorio
openaire   +2 more sources

The Mechanism of Visible‐Light Photochemical Rearrangements of Conjugated Amide Enolates

Chemistry – A European Journal, EarlyView.
Visible light irradiation of extended enolates of N‐benzylamides leads to homolytic C─N Bond cleavage, generating a biradical. Computational and mechanistic studies suggest rapid radical recombination within a solvent cage to give either ring‐expanded or rearranged products. ABSTRACT Deprotonation of conjugated amides forms colored solutions of lithium
James Mortimer, William Terry‐Wright, Basile F. E. Curchod, Jonathan Clayden   +3 more
wiley   +1 more source

Exploring the Boundaries of Aromaticity in Complex Structures and Excited States Through Computational Analysis

Chemistry – A European Journal, EarlyView.
Understanding aromaticity has evolved from benzene‐centric concepts to a broad multidimensional framework spanning organic, inorganic, and excited‐state systems. This review highlights ambiguities between magnetic, electronic, geometric, and energetic descriptors, emphasizing the need for unified, multi‐criteria approaches.
Sílvia Escayola, Miquel Solà, Albert Poater   +2 more
wiley   +1 more source

A Discrete Time and Frequency Wigner Distribution: Properities and Implementation [PDF]

, 2005
Time-frequency distributions are used in the analysis and processing of nonstationary signals. The Wigner-Ville distribution (WVD) is a fundamental time-frequency distribution uniquely satisfying many desirable mathematical properties. The realisation of
Boashash, Boualem, O'Toole, John, Mesbah, Mostefa   +2 more
core  

Generalized Beth–Uhlenbeck Entropy Formula From the Φ‐Derivable Approach

Contributions to Plasma Physics, EarlyView.
ABSTRACT We derive a generalized Beth–Uhlenbeck formula for the entropy of a dense fermion system with strong two‐particle correlations, including scattering states and bound states. We work within the Φ‐derivable approach to the thermodynamic potential.
David Blaschke, Gerd Röpke, Gordon Baym
wiley   +1 more source

Wigner distributions for gluons

, 2018
We investigate the gluon Wigner distributions for unpolarized, longitudinally polarized and transversely polarized target state. Instead of a nucleon, we take the target state to be a quark dressed with a gluon at one loop and investigate the gluon ...
MUKHERJEE, A, Asmita Mukherjee, MORE, J, Jai More, Sreeraj Nair, NAIR, S   +5 more
core   +1 more source

Hadron Tomography through Wigner Distributions [PDF]

, 2012
We study the Wigner functions of the nucleon which provide multidimensional images of the quark distributions in phase space and combine in a single picture all the information contained in the generalized parton distributions (GPDs) and the transverse ...
C. Lorce', Lorcé, C., PASQUINI, BARBARA, Pasquini, B.   +3 more
core   +1 more source

Optimised implementation of real-time discrete Wigner distribution

Electronics Letters, 1989
In the letter an optimised algorithm for real-time implementation of the discrete Wigner distribution (DWD) is presented. The algorithm makes use of the symmetry properties in the Wigner kernel and computes the analytic signal recursively in the time domain. Its computation complexity is found to be very small compared with the direct implementation of
H.H. Eilouti, L.M. Khadra
openaire   +1 more source