Results 111 to 120 of about 12,410,821 (356)

Holographic unitary renormalization group for correlated electrons - I: A tensor network approach

open access: yesNuclear Physics B, 2020
We present a unified framework for the renormalisation of the Hamiltonian and eigenbasis of a system of correlated electrons, unveiling thereby the interplay between electronic correlations and many-particle entanglement.
Anirban Mukherjee, Siddhartha Lal
doaj  

The shape‐driven graphical unitary group approach to the electron correlation problem. Application to the ethylene molecule

open access: yes, 1982
A new method for the approximate solution of Schrodinger’s equation for many electron molecular systems is outlined. The new method is based on the unitary group approach (UGA) and exploits in particular the shape of loops appearing in Shavitt’s ...
Paul Saxe, D. Fox, H. Schaefer, N. Handy
semanticscholar   +1 more source

Unitary Representations of Oligomorphic Groups [PDF]

open access: yesGeometric and Functional Analysis, 2012
Removed the requirement that an oligomorphic group be closed in Definition 1.2 in order to render Theorem 2.4 correct.
openaire   +3 more sources

Earnings Quality and ESG Performance in Energy and Utilities: What Really Matters?

open access: yesInternational Journal of Finance &Economics, EarlyView.
ABSTRACT The paper investigates the controversial relationship between firms' earnings quality and environmental, social and governance (ESG) performance, focusing on the energy and utility sectors given their significant regulatory pressures, environmental impact, and capital‐intensive nature, which render ESG performance particularly important for ...
Antonios Persakis   +2 more
wiley   +1 more source

Holographic unitary renormalization group for correlated electrons - II: Insights on fermionic criticality

open access: yesNuclear Physics B, 2020
Capturing the interplay between electronic correlations and many-particle entanglement requires a unified framework for Hamiltonian and eigenbasis renormalization.
Anirban Mukherjee, Siddhartha Lal
doaj  

The structure of a class of representations of the unitary group on a Hilbert space

open access: yes, 1957
for an arbitrary representation. The purpose of the present note is to determine the structure of the most general "physical" representation, i.e., one for which the number of particles is always non-negative.
I. Segal
semanticscholar   +1 more source

Manipulation Test for Multidimensional RDD

open access: yesJournal of Applied Econometrics, EarlyView.
ABSTRACT The causal inference model for the regression discontinuity design (RDD) relies on assumptions that imply the continuity of the density of the assignment (running) variable. The test for this implication is commonly referred to as the manipulation test and is regularly reported in applied research to strengthen the design's validity.
Federico Crippa
wiley   +1 more source

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